F-01
Roots & Suffixes
词根与后缀💡 概念 Concept
Many English words are built from a base word (the root) plus small endings called suffixes. A suffix can change the meaning — and often the word class: teach (verb) → teacher (noun). Learn a few suffixes and one root gives you several words.许多英语单词由“词根 + 后缀”构成。后缀可以改变词义，也常常改变词性：teach（动词，教）→ teacher（名词，教师）。学会几个后缀，记住一个词根就能认识好几个词。
📐 规则 Rules
词根
the base meaning: teach, act, nation
基本含义所在：教、做/行动、国家
后缀
the ending added to a root: -er, -tion, -al, -ism
加在词根后面的部分：-er、-tion、-al、-ism
词性变化
verb → noun: teach → teacher; noun → adjective: nation → national
动词→名词：teach→teacher；名词→形容词：nation→national
✏️ 例句 Examples
teach → teacher: A teacher teaches students.
teach（教）→ teacher（教师）：教师教学生。
sing → singer: My sister is a good singer.
sing（唱）→ singer（歌手）：我姐姐是个好歌手。
act → action: We must take action now.
act（行动）→ action（行动/措施）：我们必须现在采取行动。
⚠️ 常见错误 Common Mistakes
❌ She is a teach. → A person who teaches is a teacher.❌ “教的人”是 teacher，不是 teach：She is a teacher.（她是教师。）
❌ The educate is very important. → Use the noun: Education is very important.❌ “教育”作名词是 education：Education is very important.（教育非常重要。）
F-02
-er / -or
-er / -or 表示“做…的人”💡 概念 Concept
Add -er or -or to many verbs to name the person who does the action: teach → teacher, work → worker, act → actor, visit → visitor. Watch the spelling: write → writer (drop the silent e), run → runner (double the consonant).在许多动词后加 -er 或 -or，表示“做这个动作的人”：teach→teacher（教师）、work→worker（工人）、act→actor（演员）、visit→visitor（访客）。注意拼写：write→writer（去掉不发音的 e）、run→runner（双写辅音）。
📐 规则 Rules
加 -er
teach → teacher; work → worker; play → player; drive → driver
教→教师；工作→工人；玩→球员；开车→司机
去 e 加 -er
write → writer; dance → dancer; make → maker
写→作家；跳舞→舞者；制造→制造者
双写加 -er
run → runner; swim → swimmer
跑→跑步者；游泳→游泳者
加 -or
act → actor; visit → visitor; invent → inventor
表演→演员；参观→访客；发明→发明家
✏️ 例句 Examples
A teacher teaches; a learner learns.
教师负责教，学习者负责学。
My uncle is a famous actor.
我叔叔是一位著名的演员。
The runner won the race!
那位跑步者赢得了比赛！
⚠️ 常见错误 Common Mistakes
❌ acter → actor（-or，不是 -er）❌ actor 用 -or：actor（演员）。
❌ A teacher teach English. → A teacher teaches English.❌ 主语第三人称单数时动词加 -s：A teacher teaches English.（教师教英语。）
❌ He is a good runer. → He is a good runner.❌ run 要双写 n 再加 -er：runner（跑步者）。
F-03
-tion / -sion
-tion / -sion 动词变名词💡 概念 Concept
Add -tion or -sion to many verbs to make nouns of actions, states, or results: act → action, educate → education, inform → information, decide → decision. Spelling tip: verbs ending in -te take -tion; verbs ending in -de often take -sion.在许多动词后加 -tion 或 -sion，构成表示“动作、状态或结果”的名词：act→action（行动）、educate→education（教育）、inform→information（信息）、decide→decision（决定）。拼写提示：以 -te 结尾的动词接 -tion；以 -de 结尾的常接 -sion。
📐 规则 Rules
-te → -tion
educate → education; create → creation; celebrate → celebration
教育→教育；创造→创造；庆祝→庆祝
-de → -sion
decide → decision; divide → division
决定→决定；分开→除法/分歧
其他 -tion
act → action; inform → information; invent → invention
行动→行动；告知→信息；发明→发明
常为不可数
information 不可数：some information, a piece of information
information 不可数：一些信息、一条信息
✏️ 例句 Examples
act → action: Actions speak louder than words.
act（行动）→ action：行动胜于言语。
Education changes lives.
教育改变人生。
She made a quick decision.
她很快做出了决定。
⚠️ 常见错误 Common Mistakes
❌ I need an information. → information is uncountable: I need some information.❌ information 不可数：I need some information.（我需要一些信息。）
❌ invent is useful. → Use the noun: The invention is useful.❌ “发明物/发明”作名词是 invention：The invention is useful.（这项发明很有用。）
F-04
-al 名词变形容词
-al 构成形容词💡 概念 Concept
Add -al to many nouns to make adjectives meaning 'relating to': nation → national, education → educational, profession → professional, tradition → traditional. Watch spelling changes: nature → natural, music → musical.在许多名词后加 -al，构成“与…有关的”形容词：nation（国家）→ national（国家的）、education（教育）→ educational（教育的）、profession（职业）→ professional（职业的/专业的）、tradition（传统）→ traditional（传统的）。注意拼写变化：nature→natural、music→musical。
📐 规则 Rules
-tion → -tional
education → educational; tradition → traditional
教育→教育的；传统→传统的
nation → national
national flag, national team
国旗、国家队
profession → professional
professional advice, a professional player
专业的建议、职业球员
拼写变化
nature → natural; music → musical; culture → cultural
自然→自然的；音乐→音乐的；文化→文化的
✏️ 例句 Examples
This is a national holiday.
这是一个全国性的节日。
Educational games help children learn.
教育类游戏帮助孩子学习。
You should ask a professional for advice.
你应该咨询专业人士的意见。
⚠️ 常见错误 Common Mistakes
❌ a nation festival → a national festival❌ “国家的节日”用形容词 national：a national festival（国庆节/全国性节日）。
❌ an education video → an educational video❌ “教育类的视频”用形容词 educational：an educational video（教育视频）。
F-05
-ism 主义与信念
-ism 表示主义/体系💡 概念 Concept
The suffix -ism makes nouns for beliefs, systems, or movements. See how a word can grow step by step: profession → professional → professionalism; nation → national → nationalism; environment → environmental → environmentalism.后缀 -ism 构成表示“主义、体系、运动”的名词。看一个词如何一步步长大：profession（职业）→ professional（专业的）→ professionalism（专业精神）；nation（国家）→ national（国家的）→ nationalism（民族主义）；environment（环境）→ environmental（环境的）→ environmentalism（环保主义）。
📐 规则 Rules
-al + ism
professional → professionalism; traditional → traditionalism
专业的→专业精神；传统的→传统主义
常见 -ism 词
capital → capitalism; tour → tourism; real → realism
资本→资本主义；旅游→旅游业；现实→现实主义
词义方向
名词/形容词 + ism = 一种信念或体系
名词/形容词 + ism = 一种信念或体系
不可随意造词
只有真实存在的词才能用：可说 tourism，不说 bookism
只有真实存在的词才能用：可以说 tourism，不能自己造 bookism
✏️ 例句 Examples
profession → professional → professionalism: Her professionalism impressed everyone.
职业→专业的→专业精神：她的专业精神打动了所有人。
nation → national → nationalism: Sports can unite people beyond nationalism.
国家→国家的→民族主义：体育能把人们团结起来，超越民族主义。
Tourism brings money to small towns.
旅游业为小镇带来收入。
⚠️ 常见错误 Common Mistakes
❌ He is famous for his professional. → Use the noun: his professionalism.❌ “专业精神”是 professionalism：He is famous for his professionalism.（他以专业精神著称。）
❌ I love the tradition food. → Use the adjective: traditional food.❌ “传统的食物”用形容词 traditional：traditional food（传统美食）。
❌ 造词如 teacheism ✗ → 查词典，用真实存在的词❌ 不要随意创造 -ism 词：先查词典确认，用真实存在的词。