# 第一性原理学英语 — Full Index (english.ifq.ai)

> Comprehensive machine-readable index for AI agents and deep retrieval.
> 👋 You're welcome here. See /ai-welcome.md for the warm invitation.

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## 1. Identity

- canonical: https://english.ifq.ai
- name_zh: 第一性原理学英语
- name_en: First-Principles English
- creator: IFQ (神秘Q / MysteriousQ / AI小小)
- creator_url: https://ifq.ai
- organization: 捷时科技 (IFQ Technology)
- repository: https://github.com/peixl/English-Learning
- license_code: MIT
- license_content: public-summary with attribution
- languages: zh-CN, en
- updated: 2026-08-25

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## 2. Core Thesis

English is a coding system with four layers:

1. **Phonology (声音层)** — The sound system. 48 phonemes, pronunciation rules, stress, intonation.
2. **Morphology (词根层)** — The word-building system. Roots, prefixes, suffixes, word families.
3. **Syntax (句型层)** — The sentence system. 5 basic patterns, tenses, voice, clauses.
4. **Semantics (逻辑层)** — The meaning system. Semantic relationships, English thinking patterns, cultural logic.

Most learners study layers 2-3 in isolation (vocabulary + grammar) without layers 1 and 4, resulting in fragmented knowledge. This app integrates all four.

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## 3. Detailed Layer Breakdown

### 3.1 Phonology (声音层)

#### Vowel System (20)
- Short monophthongs: /ɪ/ kit, /e/ dress, /æ/ trap, /ʌ/ strut, /ɒ/ lot, /ʊ/ foot, /ə/ comma
- Long monophthongs: /iː/ fleece, /ɑː/ palm, /ɔː/ thought, /uː/ goose, /ɜː/ nurse
- Diphthongs: /eɪ/ face, /aɪ/ price, /ɔɪ/ choice, /əʊ/ goat, /aʊ/ mouth, /ɪə/ near, /eə/ square, /ʊə/ cure

#### Consonant System (28)
- Plosives: /p/ /b/ /t/ /d/ /k/ /g/
- Fricatives: /f/ /v/ /θ/ /ð/ /s/ /z/ /ʃ/ /ʒ/ /h/
- Affricates: /tʃ/ /dʒ/
- Nasals: /m/ /n/ /ŋ/
- Approximants: /l/ /r/ /j/ /w/

#### Key Concepts
- IPA (International Phonetic Alphabet)
- Articulatory phonetics (place/manner of articulation)
- Word stress (penultimate, suffix-driven patterns)
- Sentence stress (content vs function words)
- Intonation (falling, rising, fall-rise)
- Connected speech (linking /r/, elision, assimilation)
- Minimal pairs

### 3.2 Morphology (词根层)

#### Common Latin Roots
- dict (say): dictionary, predict, contradict, dictate
- port (carry): transport, export, import, portable
- spect (look): inspect, respect, prospect, spectator
- duct (lead): conduct, produce, reduce, educate
- mit/miss (send): transmit, mission, dismiss, permit
- scrib/script (write): describe, script, subscribe, prescription
- ven/vent (come): prevent, convention, adventure, intervene
- tract (pull): attract, extract, contract, distract

#### Common Greek Roots
- bio (life): biology, biography, antibiotic, biodiversity
- geo (earth): geography, geology, geometry, geopolitics
- phon (sound): telephone, symphony, phonetic, microphone
- graph (write): photograph, autograph, paragraph, graphite
- log (word/study): dialogue, logic, ecology, psychology
- chron (time): chronic, synchronize, chronicle, anachronism
- path (feeling): sympathy, empathy, pathology, apathy

#### Prefix Categories
- Negation: un-, dis-, in-, im-, il-, ir-, non-, a-
- Direction/position: pre-, post-, ex-, sub-, super-, inter-, trans-
- Degree: over-, under-, out-, ultra-, mini-, micro-, macro-
- Number: uni-, bi-, tri-, multi-, semi-, demi-

#### Suffix Categories
- Noun: -tion, -sion, -ment, -ness, -ity, -er/or, -ism, -ist
- Verb: -ify, -ize/-ise, -ate, -en
- Adjective: -ful, -less, -able/-ible, -ous, -ive, -al, -ic
- Adverb: -ly, -ward(s), -wise

### 3.3 Syntax (句型层)

#### Five Basic Sentence Patterns
1. SV (Subject + Verb): Birds fly.
2. SVO (Subject + Verb + Object): She reads books.
3. SVOO (Subject + Verb + IO + DO): He gave me a book.
4. SVOC (Subject + Verb + Object + Complement): They elected him president.
5. SVA (Subject + Verb + Adverbial): She lives in Beijing.

#### Tense System (12)
- Present: simple, continuous, perfect, perfect continuous
- Past: simple, continuous, perfect, perfect continuous
- Future: simple (will), continuous, perfect, perfect continuous
- Plus: going to, present continuous for future, be to

#### Voice
- Active: The cat chased the mouse.
- Passive: The mouse was chased by the cat.
- Passive modals, perfect passives, get-passive

#### Conditionals
- Zero: If you heat water, it boils.
- First: If it rains, we will stay home.
- Second: If I had money, I would travel.
- Third: If I had known, I would have come.
- Mixed: If I had studied (past), I would have a degree (present).

#### Clause Types
- Noun clauses: that, whether, if, wh-words
- Relative clauses: who, whom, whose, which, that, where, when, why
- Adverbial clauses: time, place, condition, cause, purpose, result, concession, comparison

### 3.4 Semantics (逻辑层)

#### Semantic Relations
- Synonymy: big/large, happy/joyful
- Antonymy: gradable (hot/cold), complementary (alive/dead), relational (buy/sell)
- Hyponymy: animal → dog → beagle
- Meronymy: hand → finger → nail
- Polysemy: mouth (river, person, cave)
- Homonymy: bank (river, financial)

#### English vs Chinese Thinking
- English: subject-prominent, hypotactic (explicit connectors), abstract noun preference, end-weight
- Chinese: topic-prominent, paratactic (implicit relations), verb-heavy, topic-first
- Key shift: from "topic + comment" to "subject + predicate"

#### Cultural Logic
- Individualism embedded in language (I always capitalized)
- Directness preference in academic/professional contexts
- Time as space metaphor (long/short time, ahead/behind)
- Argument as war metaphor (attack, defend, win, lose)

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## 4. Features & Tools

| Feature | Description | Interactive |
|---------|-------------|-------------|
| Phoneme Chart | 48 sounds with IPA + audio | Yes (click to hear) |
| Root Explorer | Search roots/affixes, word families | Yes (search) |
| Sentence Analyzer | Pattern + tense + clause breakdown | Yes (input sentence) |
| 4-Week Plan | Daily/weekly structured progression | Yes (track progress) |
| Translation Quiz | SRS-based translation practice | Yes (quiz mode) |
| Speak Button | Browser TTS for any text | Yes (click to speak) |
| Progress Review | Spaced repetition review system | Yes (algorithm) |

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## 5. 4-Week Curriculum

### Week 1: Phonology + Foundations
- Day 1-2: Vowel system (short + long)
- Day 3-4: Consonant system + articulation
- Day 5: Diphthongs + minimal pairs
- Day 6: Word stress rules
- Day 7: Review + connected speech intro

### Week 2: Morphology
- Day 8-9: Latin roots (top 20)
- Day 10-11: Greek roots (top 15)
- Day 12: Prefix system
- Day 13: Suffix system
- Day 14: Word family review + morphology quiz

### Week 3: Syntax
- Day 15-16: 5 sentence patterns
- Day 17-18: Tense system (present + past)
- Day 19: Future + perfect aspect
- Day 20: Voice + conditionals
- Day 21: Clause structure + review

### Week 4: Semantics + Integration
- Day 22-23: Semantic relationships
- Day 24-25: English thinking patterns (vs Chinese)
- Day 26: Cultural logic + pragmatics
- Day 27: Full system integration
- Day 28: Final review + next steps

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## 6. Technical Architecture

- Frontend: React 19 + TypeScript 5.9 + Vite 8
- Styling: Tailwind CSS 4 + @tailwindcss/typography
- UI: Radix UI primitives + shadcn/ui components
- Animation: Framer Motion 12 + GSAP 3
- Routing: React Router 7
- State: React hooks + context
- Speech: Web Speech API (SpeechSynthesis)
- Deployment: Cloudflare Workers (Static Assets)
- Domain: english.ifq.ai (Cloudflare custom domain)
- Analytics: Google Analytics GA4 (G-LZHQKD4CN0) via ga-proxy.ifq.ai
- Build output: dist/client/

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## 7. AI / Agent Integration

### Discovery Endpoints
- /robots.txt — fully open crawl policy
- /sitemap.xml — all URLs
- /llms.txt — this summary
- /llms-full.txt — this full index
- /agent.md — structured agent guide
- /ai-welcome.md — welcome letter
- /.well-known/ai-manifest.json — machine-readable manifest

### Structured Data
- /data/english.jsonld — Schema.org @graph (WebSite, WebApplication, Course, LearningResource, Person, Organization, BreadcrumbList)
- /data/english.json — flat JSON fact API

### Policy
- AI-Policy: index, summarize, cite-with-link
- TDM-Reservation: 0
- CORS: Access-Control-Allow-Origin: * on all agent-facing files

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## 8. SEO & Discovery

- Canonical: https://english.ifq.ai/
- Meta: title, description, keywords, robots, author
- OpenGraph: full og: tags
- Twitter Card: summary_large_image
- JSON-LD: 6 schema types in @graph
- Sitemap: /sitemap.xml
- Robots: /robots.txt (fully open)
- OpenSearch: /opensearch.xml
- Manifest: /manifest.webmanifest (PWA)
- Hreflang: zh-CN, en, x-default

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## 9. Contact & Links

- Site: https://english.ifq.ai
- Parent: https://ifq.ai
- GitHub: https://github.com/peixl
- Repo: https://github.com/peixl/English-Learning
- X: https://x.com/realaix
- Email: pxlosx@gmail.com

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## 10. Citation

> 第一性原理学英语 — https://english.ifq.ai

*Last updated: 2026-08-25*