434 lines
16 KiB
TypeScript
434 lines
16 KiB
TypeScript
import React, { useRef, useState, useEffect } from "react";
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import { ArrowDown, Check, BookOpen, AlertTriangle, Zap } from "lucide-react";
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import { PracticeFromDataset } from "../../../components/lessons/LessonShell";
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import {
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FORM_STRUCTURE_EASY,
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FORM_STRUCTURE_MEDIUM,
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} from "../../../data/rw/form-structure-sense";
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import ClauseBreakdownWidget, {
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type ClauseExample,
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} from "../../../components/lessons/ClauseBreakdownWidget";
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import DecisionTreeWidget, {
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type TreeScenario,
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type TreeNode,
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} from "../../../components/lessons/DecisionTreeWidget";
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interface LessonProps {
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onFinish?: () => void;
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}
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// ── Clause Breakdown data ──────────────────────────────────────────────────
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const CLAUSE_EXAMPLES: ClauseExample[] = [
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{
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title: "Verb Tense — Past Sequence",
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segments: [
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{
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text: "By the time the results arrived",
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type: "dc",
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label: "Dependent Clause — earlier action",
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},
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{ text: ",", type: "punct" },
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{
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text: " the team had already published",
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type: "verb",
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label: "Past Perfect: action completed before another past action",
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},
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{ text: " their findings", type: "ic", label: "" },
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{ text: ".", type: "punct" },
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],
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},
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{
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title: "Subjunctive Mood",
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segments: [
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{
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text: "If the data were",
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type: "dc",
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label: "Subjunctive: 'were' not 'was' — hypothetical condition",
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},
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{ text: " more complete", type: "ic", label: "" },
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{ text: ",", type: "punct" },
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{
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text: " the conclusions would be stronger",
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type: "ic",
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label: "Main clause with 'would'",
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},
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{ text: ".", type: "punct" },
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],
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},
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{
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title: "Gerund vs. Infinitive",
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segments: [
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{ text: "The committee", type: "subject", label: "Subject" },
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{
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text: " decided",
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type: "verb",
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label: "Verb: 'decided' takes infinitive",
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},
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{
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text: " to postpone",
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type: "conjunction",
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label: "Infinitive: 'to + verb'",
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},
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{ text: " the vote", type: "ic", label: "" },
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{ text: ".", type: "punct" },
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],
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},
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];
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// ── Decision Tree data ─────────────────────────────────────────────────────
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const VERB_TREE: TreeNode = {
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id: "root",
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question: "What verb form problem is in this sentence?",
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hint: "Is it about: (1) tense consistency/sequence, (2) subjunctive mood (if/wish), or (3) verb form (gerund '-ing' vs. infinitive 'to-verb')?",
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yesLabel: "Tense or sequence issue",
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noLabel: "Subjunctive or verb form issue",
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yes: {
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id: "tense",
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question:
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"Does the sentence describe an action that happened BEFORE another past action?",
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hint: "'By the time X happened, Y had already...' — the earlier action needs past perfect (had + verb).",
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yesLabel: "Yes — one action preceded another",
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noLabel: "No — all actions at the same time",
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yes: {
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id: "past-perfect",
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result:
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"✓ Use PAST PERFECT (had + past participle) for the earlier action: 'had published,' 'had discovered,' 'had completed.'",
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resultType: "correct",
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ruleRef: "Earlier: had + [past participle] | Later: simple past",
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},
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no: {
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id: "tense-consistency",
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result:
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"✓ Keep tense CONSISTENT with the surrounding context. If the passage is in past tense, don't switch to present or future unnecessarily.",
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resultType: "correct",
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ruleRef: "Match the dominant tense of the passage",
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},
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},
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no: {
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id: "subj-or-form",
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question:
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"Does the sentence contain 'if,' 'wish,' 'as if,' or 'as though' — expressing a hypothetical or contrary-to-fact condition?",
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yesLabel: "Yes — hypothetical or wish",
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noLabel: "No — it's about gerund vs. infinitive",
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yes: {
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id: "subjunctive",
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question:
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"Is the condition clearly FALSE or hypothetical (not likely to be true)?",
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yesLabel: "Yes — clearly hypothetical",
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noLabel: "No — it could be real/possible",
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yes: {
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id: "subjunctive-were",
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result:
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"✓ Use SUBJUNCTIVE WERE (not 'was'): 'If the data were complete...' / 'I wish the study were larger.'",
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resultType: "correct",
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ruleRef:
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"Hypothetical: If [subject] were... / I wish [subject] were...",
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},
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no: {
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id: "indicative-if",
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result:
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"✓ Use indicative 'was' — the condition is possible, not hypothetical: 'If the data was incorrect, we would know by now.'",
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resultType: "correct",
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ruleRef: "Possible condition: If [subject] was...",
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},
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},
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no: {
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id: "gerund-infinitive",
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question:
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"Does the main verb PREFER a gerund (enjoy, avoid, consider, suggest) or an infinitive (decide, want, plan, need)?",
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hint: "Gerund (-ing): 'The team avoided making errors.' Infinitive (to-verb): 'The team decided to revise.'",
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yesLabel: "Gerund (-ing) after this verb",
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noLabel: "Infinitive (to-verb) after this verb",
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yes: {
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id: "use-gerund",
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result:
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"✓ Use the GERUND (-ing form): avoid, enjoy, consider, suggest, recommend → 'avoid making,' 'enjoy reading.'",
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resultType: "correct",
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ruleRef: "avoid/enjoy/consider + [verb]-ing",
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},
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no: {
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id: "use-infinitive",
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result:
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"✓ Use the INFINITIVE (to + verb): decide, want, need, plan, hope, agree → 'decided to publish,' 'hoped to complete.'",
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resultType: "correct",
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ruleRef: "decide/want/need/plan + to [verb]",
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},
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},
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},
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};
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const TREE_SCENARIOS: TreeScenario[] = [
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{
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label: "Sentence 1",
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sentence:
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"By the time the paper was published, the researchers already discovered three additional variables.",
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tree: VERB_TREE,
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},
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{
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label: "Sentence 2",
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sentence:
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"If the sample size was larger, the study's conclusions would be more reliable.",
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tree: VERB_TREE,
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},
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{
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label: "Sentence 3",
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sentence:
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"The committee recommended to adopt the new protocol before the next review cycle.",
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tree: VERB_TREE,
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},
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];
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// ── Lesson component ───────────────────────────────────────────────────────
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const EBRWVerbsLesson: React.FC<LessonProps> = ({ onFinish }) => {
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const [activeSection, setActiveSection] = useState(0);
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const sectionsRef = useRef<(HTMLElement | null)[]>([]);
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useEffect(() => {
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const observers: IntersectionObserver[] = [];
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sectionsRef.current.forEach((el, idx) => {
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if (!el) return;
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const obs = new IntersectionObserver(
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([entry]) => {
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if (entry.isIntersecting) setActiveSection(idx);
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},
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{ threshold: 0.3 },
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);
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obs.observe(el);
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observers.push(obs);
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});
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return () => observers.forEach((o) => o.disconnect());
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}, []);
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const scrollToSection = (index: number) => {
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setActiveSection(index);
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sectionsRef.current[index]?.scrollIntoView({ behavior: "smooth" });
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};
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const SectionMarker = ({
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index,
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title,
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icon: Icon,
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}: {
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index: number;
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title: string;
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icon: React.ElementType;
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}) => {
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const isActive = activeSection === index;
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const isPast = activeSection > index;
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return (
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<button
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onClick={() => scrollToSection(index)}
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className={`flex items-center gap-3 p-3 w-full rounded-lg text-left transition-all ${isActive ? "bg-purple-50" : "hover:bg-slate-50"}`}
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>
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<div
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className={`w-8 h-8 rounded-full flex items-center justify-center shrink-0
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${isActive ? "bg-purple-600 text-white" : isPast ? "bg-purple-400 text-white" : "bg-slate-200 text-slate-500"}`}
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>
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{isPast ? (
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<Check className="w-4 h-4" />
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) : (
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<Icon className="w-4 h-4" />
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)}
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</div>
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<p
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className={`text-sm font-bold ${isActive ? "text-purple-900" : "text-slate-600"}`}
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>
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{title}
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</p>
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</button>
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);
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};
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return (
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<div className="flex flex-col lg:flex-row min-h-screen">
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<aside className="w-full lg:w-64 lg:fixed lg:top-14 lg:bottom-0 lg:overflow-y-auto p-4 border-r border-slate-200 bg-slate-50 z-0 hidden lg:block">
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<nav className="space-y-2 pt-6">
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<SectionMarker index={0} title="Verb Anatomy" icon={BookOpen} />
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<SectionMarker
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index={1}
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title="Decision Tree Lab"
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icon={AlertTriangle}
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/>
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<SectionMarker index={2} title="Practice Questions" icon={Zap} />
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</nav>
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</aside>
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<div className="flex-1 lg:ml-64 p-6 md:p-12 max-w-4xl mx-auto">
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{/* Section 0 — Concept + Clause Breakdown */}
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<section
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ref={(el) => {
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sectionsRef.current[0] = el;
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}}
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className="min-h-screen flex flex-col justify-center mb-24 pt-20 lg:pt-0"
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>
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<div className="inline-flex items-center gap-2 bg-purple-100 text-purple-700 px-3 py-1 rounded-full text-xs font-bold uppercase tracking-wider mb-4 w-fit">
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Standard English Conventions
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</div>
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<h2 className="text-4xl font-extrabold text-slate-900 mb-2">
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Verb Anatomy
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</h2>
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<p className="text-lg text-slate-500 mb-8">
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See how verb tense, mood, and form work in context — then apply the
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rules.
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</p>
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{/* Rule summary grid */}
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<div className="grid grid-cols-1 sm:grid-cols-2 gap-4 mb-8">
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{[
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{
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num: 1,
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rule: "Tense Consistency",
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desc: "Match the dominant tense of the passage. Don't randomly shift.",
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},
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{
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num: 2,
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rule: "Past Perfect",
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desc: "Use 'had + verb' for the earlier of two past events.",
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},
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{
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num: 3,
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rule: "Subjunctive Were",
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desc: "Hypothetical conditions: 'If [subject] were...' regardless of singular/plural.",
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},
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{
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num: 4,
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rule: "Gerund vs. Infinitive",
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desc: "Certain verbs take gerunds; others take infinitives. Memory: avoid/enjoy/consider + -ing. decide/want/plan + to-verb.",
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},
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].map((r) => (
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<div
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key={r.num}
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className="bg-purple-50 border border-purple-200 rounded-xl p-4"
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>
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<div className="flex items-center gap-2 mb-1">
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<span className="w-6 h-6 rounded-full bg-purple-600 text-white flex items-center justify-center text-xs font-bold shrink-0">
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{r.num}
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</span>
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<span className="font-bold text-purple-900 text-sm">
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{r.rule}
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</span>
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</div>
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<p className="text-xs text-slate-600 ml-8">{r.desc}</p>
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</div>
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))}
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</div>
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{/* Clause Breakdown */}
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<h3 className="text-xl font-bold text-slate-800 mb-3">
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Sentence Anatomy
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</h3>
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<p className="text-sm text-slate-500 mb-4">
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Hover over any colored span to see its label. Use the tabs to switch
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between examples.
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</p>
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<ClauseBreakdownWidget
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examples={CLAUSE_EXAMPLES}
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accentColor="purple"
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/>
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{/* Traps */}
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<div className="mt-8 space-y-3 mb-8">
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{[
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{
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label: "Past Perfect vs. Simple Past",
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desc: "'had already published' (earlier) vs. 'published' (simple past). Don't confuse sequence with simultaneity.",
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},
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{
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label: "Was vs. Were (Subjunctive)",
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desc: "Hypothetical conditions use 'were' even with singular subjects: 'If she were the lead researcher...'",
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},
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{
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label: "Gerund/Infinitive Collocations",
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desc: "'suggest to do' is wrong; 'suggest doing' is correct. 'decide doing' is wrong; 'decide to do' is correct.",
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},
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].map((t) => (
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<div
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key={t.label}
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className="flex gap-3 bg-red-50 border border-red-200 rounded-xl px-4 py-3"
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>
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<AlertTriangle className="w-4 h-4 text-red-500 shrink-0 mt-0.5" />
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<div>
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<p className="text-sm font-bold text-red-800">{t.label}</p>
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<p className="text-xs text-slate-600 mt-0.5">{t.desc}</p>
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</div>
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</div>
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))}
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</div>
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<div className="mt-2 bg-purple-900 text-white rounded-2xl p-5">
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<p className="font-bold mb-1">Golden Rule</p>
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<p className="text-sm text-purple-100">
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Three verb traps dominate the SAT: mixing tenses in a sequence,
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missing the subjunctive "were" in hypotheticals, and using the
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wrong verb form (gerund/infinitive). Always check the time
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relationship and the main verb's preference.
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</p>
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</div>
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<button
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onClick={() => scrollToSection(1)}
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className="mt-12 group flex items-center text-purple-600 font-bold hover:text-purple-800 transition-colors"
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>
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Next: Decision Tree Lab{" "}
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<ArrowDown className="ml-2 w-5 h-5 group-hover:translate-y-1 transition-transform" />
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</button>
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</section>
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{/* Section 1 — Decision Tree */}
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<section
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ref={(el) => {
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sectionsRef.current[1] = el;
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}}
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className="min-h-screen flex flex-col justify-center mb-24"
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>
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<h2 className="text-4xl font-extrabold text-slate-900 mb-2">
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Decision Tree Lab
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</h2>
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<p className="text-lg text-slate-500 mb-8">
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Work through the verb logic one question at a time. Click your
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answer at each step.
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</p>
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<DecisionTreeWidget scenarios={TREE_SCENARIOS} accentColor="purple" />
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<button
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onClick={() => scrollToSection(2)}
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className="mt-12 group flex items-center text-purple-600 font-bold hover:text-purple-800 transition-colors"
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>
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Next: Practice Questions{" "}
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<ArrowDown className="ml-2 w-5 h-5 group-hover:translate-y-1 transition-transform" />
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</button>
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</section>
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{/* Section 2 — Quiz */}
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<section
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ref={(el) => {
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sectionsRef.current[2] = el;
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}}
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className="min-h-screen flex flex-col justify-center mb-24"
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>
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<h2 className="text-4xl font-extrabold text-slate-900 mb-6">
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Practice Questions
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</h2>
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{FORM_STRUCTURE_EASY.slice(4, 6).map((q) => (
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<PracticeFromDataset key={q.id} question={q} color="purple" />
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))}
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{FORM_STRUCTURE_MEDIUM.slice(2, 3).map((q) => (
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<PracticeFromDataset key={q.id} question={q} color="purple" />
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))}
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<div className="mt-8 text-center">
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<button
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onClick={onFinish}
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className="px-6 py-3 bg-purple-900 text-white font-bold rounded-full hover:bg-purple-700 transition-colors"
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>
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Finish Lesson ✓
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</button>
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</div>
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</section>
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</div>
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</div>
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);
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};
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export default EBRWVerbsLesson;
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