425 lines
15 KiB
TypeScript
425 lines
15 KiB
TypeScript
import React, { useRef, useState, useEffect } from "react";
|
|
import { ArrowDown, Check, BookOpen, AlertTriangle, Zap } from "lucide-react";
|
|
import { PracticeFromDataset } from "../../../components/lessons/LessonShell";
|
|
import {
|
|
FORM_STRUCTURE_EASY,
|
|
FORM_STRUCTURE_MEDIUM,
|
|
} from "../../../data/rw/form-structure-sense";
|
|
import ClauseBreakdownWidget, {
|
|
type ClauseExample,
|
|
} from "../../../components/lessons/ClauseBreakdownWidget";
|
|
import DecisionTreeWidget, {
|
|
type TreeScenario,
|
|
type TreeNode,
|
|
} from "../../../components/lessons/DecisionTreeWidget";
|
|
|
|
interface LessonProps {
|
|
onFinish?: () => void;
|
|
}
|
|
|
|
// ── Clause Breakdown data ──────────────────────────────────────────────────
|
|
const CLAUSE_EXAMPLES: ClauseExample[] = [
|
|
{
|
|
title: "Prepositional Phrase Trap",
|
|
segments: [
|
|
{
|
|
text: "The results",
|
|
type: "subject",
|
|
label: "True Subject: 'results' (plural)",
|
|
},
|
|
{
|
|
text: " of the study",
|
|
type: "modifier",
|
|
label: "Prepositional Phrase — ignore for agreement",
|
|
},
|
|
{ text: " were", type: "verb", label: "Plural Verb ✓" },
|
|
{ text: " significant", type: "ic", label: "" },
|
|
{ text: ".", type: "punct" },
|
|
],
|
|
},
|
|
{
|
|
title: "Collective Noun — Singular",
|
|
segments: [
|
|
{
|
|
text: "The committee",
|
|
type: "subject",
|
|
label: "Collective Noun — singular",
|
|
},
|
|
{ text: " has", type: "verb", label: "Singular Verb ✓" },
|
|
{ text: " reached", type: "verb", label: "" },
|
|
{ text: " a decision", type: "ic", label: "" },
|
|
{ text: ".", type: "punct" },
|
|
],
|
|
},
|
|
{
|
|
title: "Inverted Sentence",
|
|
segments: [
|
|
{
|
|
text: "Among the findings",
|
|
type: "modifier",
|
|
label: "Introductory Phrase — not the subject",
|
|
},
|
|
{
|
|
text: " was",
|
|
type: "verb",
|
|
label: "Singular Verb — matches 'one key result'",
|
|
},
|
|
{
|
|
text: " one key result",
|
|
type: "subject",
|
|
label: "True Subject: singular",
|
|
},
|
|
{ text: ".", type: "punct" },
|
|
],
|
|
},
|
|
];
|
|
|
|
// ── Decision Tree data ─────────────────────────────────────────────────────
|
|
const SUBJECT_VERB_TREE: TreeNode = {
|
|
id: "root",
|
|
question: "What is the TRUE grammatical subject of the sentence?",
|
|
hint: "Strip away all prepositional phrases (of, in, with, by...), relative clauses, and modifiers. What's left is your true subject.",
|
|
yesLabel: "I found it — it's singular",
|
|
noLabel: "I found it — it's plural",
|
|
yes: {
|
|
id: "singular-subject",
|
|
question:
|
|
"Is the subject a collective noun (team, committee, group, class, family) acting as one unit?",
|
|
yesLabel: "Yes — collective noun",
|
|
noLabel: "No — regular singular noun",
|
|
yes: {
|
|
id: "collective-singular",
|
|
result:
|
|
'✓ Use a SINGULAR verb. Collective nouns acting as a single unit take singular verbs: "The committee has decided."',
|
|
resultType: "correct",
|
|
ruleRef: "[Collective noun] + singular verb (has, was, decides)",
|
|
},
|
|
no: {
|
|
id: "regular-singular",
|
|
question:
|
|
"Is the subject an indefinite pronoun (everyone, each, either, neither, anyone, someone)?",
|
|
yesLabel: "Yes — indefinite pronoun",
|
|
noLabel: "No — regular noun",
|
|
yes: {
|
|
id: "indefinite-singular",
|
|
result:
|
|
"✓ Use a SINGULAR verb. Most indefinite pronouns (everyone, each, either, neither) are grammatically singular.",
|
|
resultType: "correct",
|
|
ruleRef: "Everyone/Each/Either → singular verb",
|
|
},
|
|
no: {
|
|
id: "regular-noun-singular",
|
|
result: "✓ Use a SINGULAR verb: is, was, has, does, -s ending verbs.",
|
|
resultType: "correct",
|
|
ruleRef: "[Singular noun] + singular verb",
|
|
},
|
|
},
|
|
},
|
|
no: {
|
|
id: "plural-subject",
|
|
question: "Is the subject a compound subject joined by 'and'?",
|
|
yesLabel: "Yes — X and Y (compound)",
|
|
noLabel: "No — regular plural",
|
|
yes: {
|
|
id: "compound-and",
|
|
result:
|
|
'✓ Use a PLURAL verb. "X and Y" joined with "and" is always plural: "The teacher and the student are ready."',
|
|
resultType: "correct",
|
|
ruleRef: "[Noun] and [noun] + plural verb",
|
|
},
|
|
no: {
|
|
id: "regular-plural",
|
|
question: "Is the subject joined by 'or' or 'nor'?",
|
|
yesLabel: "Yes — X or/nor Y",
|
|
noLabel: "No — just a regular plural noun",
|
|
yes: {
|
|
id: "or-nor",
|
|
result:
|
|
"⚠ 'Or/Nor' rule: the verb agrees with the CLOSER subject. \"Neither the students nor the teacher IS ready\" (IS agrees with 'teacher', the closer one).",
|
|
resultType: "warning",
|
|
ruleRef: "Neither A nor [B] + verb matching B (the closer subject)",
|
|
},
|
|
no: {
|
|
id: "plain-plural",
|
|
result: "✓ Use a PLURAL verb: are, were, have, do, -s removed.",
|
|
resultType: "correct",
|
|
ruleRef: "[Plural noun] + plural verb",
|
|
},
|
|
},
|
|
},
|
|
};
|
|
|
|
const TREE_SCENARIOS: TreeScenario[] = [
|
|
{
|
|
label: "Sentence 1",
|
|
sentence:
|
|
"The committee of senior researchers have decided to delay the publication.",
|
|
tree: SUBJECT_VERB_TREE,
|
|
},
|
|
{
|
|
label: "Sentence 2",
|
|
sentence:
|
|
"Neither the students nor the professor were prepared for the final exam.",
|
|
tree: SUBJECT_VERB_TREE,
|
|
},
|
|
{
|
|
label: "Sentence 3",
|
|
sentence:
|
|
"Among the most important discoveries of the decade was two breakthrough treatments.",
|
|
tree: SUBJECT_VERB_TREE,
|
|
},
|
|
];
|
|
|
|
// ── Lesson component ───────────────────────────────────────────────────────
|
|
const EBRWSubjectVerbLesson: React.FC<LessonProps> = ({ onFinish }) => {
|
|
const [activeSection, setActiveSection] = useState(0);
|
|
const sectionsRef = useRef<(HTMLElement | null)[]>([]);
|
|
|
|
useEffect(() => {
|
|
const observers: IntersectionObserver[] = [];
|
|
sectionsRef.current.forEach((el, idx) => {
|
|
if (!el) return;
|
|
const obs = new IntersectionObserver(
|
|
([entry]) => {
|
|
if (entry.isIntersecting) setActiveSection(idx);
|
|
},
|
|
{ threshold: 0.3 },
|
|
);
|
|
obs.observe(el);
|
|
observers.push(obs);
|
|
});
|
|
return () => observers.forEach((o) => o.disconnect());
|
|
}, []);
|
|
|
|
const scrollToSection = (index: number) => {
|
|
setActiveSection(index);
|
|
sectionsRef.current[index]?.scrollIntoView({ behavior: "smooth" });
|
|
};
|
|
|
|
const SectionMarker = ({
|
|
index,
|
|
title,
|
|
icon: Icon,
|
|
}: {
|
|
index: number;
|
|
title: string;
|
|
icon: React.ElementType;
|
|
}) => {
|
|
const isActive = activeSection === index;
|
|
const isPast = activeSection > index;
|
|
return (
|
|
<button
|
|
onClick={() => scrollToSection(index)}
|
|
className={`flex items-center gap-3 p-3 w-full rounded-lg text-left transition-all ${isActive ? "bg-purple-50" : "hover:bg-slate-50"}`}
|
|
>
|
|
<div
|
|
className={`w-8 h-8 rounded-full flex items-center justify-center shrink-0
|
|
${isActive ? "bg-purple-600 text-white" : isPast ? "bg-purple-400 text-white" : "bg-slate-200 text-slate-500"}`}
|
|
>
|
|
{isPast ? (
|
|
<Check className="w-4 h-4" />
|
|
) : (
|
|
<Icon className="w-4 h-4" />
|
|
)}
|
|
</div>
|
|
<p
|
|
className={`text-sm font-bold ${isActive ? "text-purple-900" : "text-slate-600"}`}
|
|
>
|
|
{title}
|
|
</p>
|
|
</button>
|
|
);
|
|
};
|
|
|
|
return (
|
|
<div className="flex flex-col lg:flex-row min-h-screen">
|
|
<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 lg:bg-transparent z-0 hidden lg:block">
|
|
<nav className="space-y-2 pt-6">
|
|
<SectionMarker index={0} title="Agreement Anatomy" icon={BookOpen} />
|
|
<SectionMarker
|
|
index={1}
|
|
title="Decision Tree Lab"
|
|
icon={AlertTriangle}
|
|
/>
|
|
<SectionMarker index={2} title="Practice Questions" icon={Zap} />
|
|
</nav>
|
|
</aside>
|
|
|
|
<div className="flex-1 lg:ml-64 p-6 md:p-12 max-w-4xl mx-auto">
|
|
{/* Section 0 — Concept + Clause Breakdown */}
|
|
<section
|
|
ref={(el) => {
|
|
sectionsRef.current[0] = el;
|
|
}}
|
|
className="min-h-screen flex flex-col justify-center mb-24 pt-20 lg:pt-0"
|
|
>
|
|
<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">
|
|
Standard English Conventions
|
|
</div>
|
|
<h2 className="text-4xl font-extrabold text-slate-900 mb-2">
|
|
Subject-Verb Agreement
|
|
</h2>
|
|
<p className="text-lg text-slate-500 mb-8">
|
|
See how sentences are built — then learn how to match the verb to
|
|
the true subject.
|
|
</p>
|
|
|
|
{/* Rule summary grid */}
|
|
<div className="grid grid-cols-1 sm:grid-cols-2 gap-4 mb-8">
|
|
{[
|
|
{
|
|
num: 1,
|
|
rule: "Strip Prep Phrases",
|
|
desc: 'Ignore "of the X, in the Y" — they hide the true subject. Find the core noun.',
|
|
},
|
|
{
|
|
num: 2,
|
|
rule: "Collective Nouns",
|
|
desc: "team, group, committee, class → singular verb when acting as one unit.",
|
|
},
|
|
{
|
|
num: 3,
|
|
rule: "Indefinite Pronouns",
|
|
desc: "each, every, either, neither, anyone, someone → always singular.",
|
|
},
|
|
{
|
|
num: 4,
|
|
rule: "Or / Nor Rule",
|
|
desc: 'Verb matches the CLOSER subject: "Neither the students nor the teacher IS."',
|
|
},
|
|
].map((r) => (
|
|
<div
|
|
key={r.num}
|
|
className="bg-purple-50 border border-purple-200 rounded-xl p-4"
|
|
>
|
|
<div className="flex items-center gap-2 mb-1">
|
|
<span className="w-6 h-6 rounded-full bg-purple-600 text-white flex items-center justify-center text-xs font-bold shrink-0">
|
|
{r.num}
|
|
</span>
|
|
<span className="font-bold text-purple-900 text-sm">
|
|
{r.rule}
|
|
</span>
|
|
</div>
|
|
<p className="text-xs text-slate-600 ml-8">{r.desc}</p>
|
|
</div>
|
|
))}
|
|
</div>
|
|
|
|
{/* Clause Breakdown */}
|
|
<h3 className="text-xl font-bold text-slate-800 mb-3">
|
|
Sentence Anatomy
|
|
</h3>
|
|
<p className="text-sm text-slate-500 mb-4">
|
|
Hover over any colored span to see its label. Use the tabs to switch
|
|
between examples.
|
|
</p>
|
|
<ClauseBreakdownWidget
|
|
examples={CLAUSE_EXAMPLES}
|
|
accentColor="purple"
|
|
/>
|
|
|
|
<div className="mt-6 bg-purple-900 text-white rounded-2xl p-5">
|
|
<p className="font-bold mb-1">Golden Rule</p>
|
|
<p className="text-sm text-purple-100">
|
|
The SAT hides subjects behind prepositional phrases and inverted
|
|
sentences. Always identify the true subject first — strip
|
|
modifiers, then match the verb.
|
|
</p>
|
|
</div>
|
|
|
|
<button
|
|
onClick={() => scrollToSection(1)}
|
|
className="mt-12 group flex items-center text-purple-600 font-bold hover:text-purple-800 transition-colors"
|
|
>
|
|
Next: Decision Tree Lab{" "}
|
|
<ArrowDown className="ml-2 w-5 h-5 group-hover:translate-y-1 transition-transform" />
|
|
</button>
|
|
</section>
|
|
|
|
{/* Section 1 — Decision Tree */}
|
|
<section
|
|
ref={(el) => {
|
|
sectionsRef.current[1] = el;
|
|
}}
|
|
className="min-h-screen flex flex-col justify-center mb-24"
|
|
>
|
|
<h2 className="text-4xl font-extrabold text-slate-900 mb-2">
|
|
Decision Tree Lab
|
|
</h2>
|
|
<p className="text-lg text-slate-500 mb-8">
|
|
Work through the agreement logic one question at a time. Click your
|
|
answer at each step.
|
|
</p>
|
|
|
|
{/* Trap callouts */}
|
|
<div className="space-y-3 mb-8">
|
|
{[
|
|
{
|
|
label: "Prepositional Phrase Trap",
|
|
desc: 'The results of the study [was/were]? Strip "of the study"; true subject is "results" (plural) → "were".',
|
|
},
|
|
{
|
|
label: "Or/Nor Proximity Rule",
|
|
desc: '"Neither A nor B" → verb matches B (the noun closer to the verb).',
|
|
},
|
|
{
|
|
label: "Inverted Sentence",
|
|
desc: '"There is/are..." and "Among X was/were Y" — find the true subject after the verb.',
|
|
},
|
|
].map((t) => (
|
|
<div
|
|
key={t.label}
|
|
className="flex gap-3 bg-red-50 border border-red-200 rounded-xl px-4 py-3"
|
|
>
|
|
<AlertTriangle className="w-4 h-4 text-red-500 shrink-0 mt-0.5" />
|
|
<div>
|
|
<p className="text-sm font-bold text-red-800">{t.label}</p>
|
|
<p className="text-xs text-slate-600 mt-0.5">{t.desc}</p>
|
|
</div>
|
|
</div>
|
|
))}
|
|
</div>
|
|
|
|
<DecisionTreeWidget scenarios={TREE_SCENARIOS} accentColor="purple" />
|
|
|
|
<button
|
|
onClick={() => scrollToSection(2)}
|
|
className="mt-12 group flex items-center text-purple-600 font-bold hover:text-purple-800 transition-colors"
|
|
>
|
|
Next: Practice Questions{" "}
|
|
<ArrowDown className="ml-2 w-5 h-5 group-hover:translate-y-1 transition-transform" />
|
|
</button>
|
|
</section>
|
|
|
|
{/* Section 2 — Quiz */}
|
|
<section
|
|
ref={(el) => {
|
|
sectionsRef.current[2] = el;
|
|
}}
|
|
className="min-h-screen flex flex-col justify-center mb-24"
|
|
>
|
|
<h2 className="text-4xl font-extrabold text-slate-900 mb-6">
|
|
Practice Questions
|
|
</h2>
|
|
{FORM_STRUCTURE_EASY.slice(0, 2).map((q) => (
|
|
<PracticeFromDataset key={q.id} question={q} color="purple" />
|
|
))}
|
|
{FORM_STRUCTURE_MEDIUM.slice(0, 1).map((q) => (
|
|
<PracticeFromDataset key={q.id} question={q} color="purple" />
|
|
))}
|
|
<div className="mt-8 text-center">
|
|
<button
|
|
onClick={onFinish}
|
|
className="px-6 py-3 bg-purple-900 text-white font-bold rounded-full hover:bg-purple-700 transition-colors"
|
|
>
|
|
Finish Lesson ✓
|
|
</button>
|
|
</div>
|
|
</section>
|
|
</div>
|
|
</div>
|
|
);
|
|
};
|
|
|
|
export default EBRWSubjectVerbLesson;
|