Unit 2 Helping at home 语法重点讲解及练习（专项训练）-2026-2027学年外研版（三起）英语四年级上册

**基本信息** 聚焦can的"会/不会"用法，以"句型结构-固定搭配-易错点"三维体系构建语法训练，通过多样化题型实现语言能力与思维品质的协同发展。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |语法讲解|3类句型+5短语+3易错点|提炼"can+动原"核心规则，明确"Can问can答"原则|从肯定句到否定句再到疑问句，构建"概念-结构-应用"逻辑链| |专项训练|8类题型（填空/单选等）|通过改错强化"can不变形"等易错点，情景选择提升语言应用能力|从单一填空到综合句型转换，实现从知识理解到语言表达的能力进阶|

【外研版（三起）四年级上册】 Unit 2 Helping at home 语法重点讲解及练习 单元语法小结 一、核心句型：can 表示“会、能够” 肯定句结构：主语 + can + 动词原形 表示某人会做某事，can 后面永远加动词原形，不加s、不加ing、不加to。 例： I can help. 我会帮忙。 I can clean the room. 我会打扫房间。 二、否定句型：can't 表示“不会、不能” 否定句结构：主语 + can't + 动词原形 can't = cannot，直接否定能力，后面同样跟动词原形。 例：I can't wash clothes. 我不会洗衣服。 三、一般疑问句：Can you...? 问答 问句结构：Can + 主语 + 动词原形？ 用来询问对方是否会做某事。 肯定回答：Yes, I can. 否定回答：No, I can't. 易错点：回答不能用 Yes, I do / No, I don't，can提问can回答。 四、重点固定搭配（家务短语） help at home 在家帮忙 clean the room 打扫房间 wash clothes 洗衣服 cook dinner 做晚饭 sweep the floor 扫地 五、易错点 1. can/can't 后必须用动词原形。 2. Can you...? 问答只能用 can/can't。 3. 主语不管是 I/you/he，can 永远不变形。 专项训练 一、用 can / can't 填空 1. I ________ help my mum at home. 2. I ________ cook dinner. It's hard. 3. I ________ clean my room. It's easy. 4. I ________ sweep the floor. I am little. 5. I ________ wash clothes for my family. 二、单项选择 ( ) 1. —______ you clean the room? —Yes, I can. A. Do B. Can C. Are ( ) 2. I can ______ the floor. A. sweep B. sweeping C. sweeps ( ) 3. I ______ cook dinner. A. not can B. can't C. don't can ( ) 4. —Can you wash clothes? —______ A. Yes, I do. B. No, I can't. C. No, I don't. ( ) 5. My sister ______ help at home. A. can B. am C. do 三、连词成句（注意大小写和标点） 1. can, I, room, the, clean (.) ________________________________ 2. you, Can, clothes, wash (?) ________________________________ 3. can't, I, dinner, cook (.) ________________________________ 4. floor, can, the, I, sweep (.) ________________________________ 5. home, I, at, help, can (.) ________________________________ 四、句型转换 1. I can clean the room.（改为否定句） ________________________________ 2. I can sweep the floor.（改为一般疑问句） ________________________________ 3. Can you wash clothes?（作肯定回答） ________________________________ 4. Can you cook dinner?（作否定回答） ________________________________ 5. I can't help at home.（改为肯定句） ________________________________ 五、判断句子正(T)误(F) ( ) 1. I can help my mum. ( ) 2. I can cooking dinner. ( ) 3. Can you clean the room? ( ) 4. Yes, I do. ( ) 5. I can't sweep the floor. 六、选词填空（clean / wash / cook / sweep / help） 1. I can ________ my mum at home. 2. I can ________ my room. 3. I can ________ the floor. 4. I can ________ clothes. 5. I can ________ dinner. 七、情景选择 ( ) 1. 你想问对方会不会打扫房间，说： A. Can you clean the room? B. I can clean the room. ( ) 2. 你想表达自己不会做晚饭，说： A. I can cook dinner. B. I can't cook dinner. ( ) 3. 别人问你 Can you help at home? 你会，回答： A. Yes, I can. B. Yes, I do. ( ) 4. 你想告诉别人你会扫地，说： A. I can sweep the floor. B. I sweep the floor. ( ) 5. 你不会洗衣服，回答： A. No, I can't. B. No, I don't. 八、改错（每句一处错误） 1. I can helps my mum. __________ 2. Can you cleaning the room? __________ 3. Yes, I do. __________ 4. I can't washes clothes. __________ 5. Do you can sweep the floor? __________ 【参考答案】 一、用 can / can't 填空 1. can 2. can't 3. can 4. can't 5. can 二、单项选择 1. B 2. A 3. B 4. B 5. A 三、连词成句 1. I can clean the room. 2. Can you wash clothes? 3. I can't cook dinner. 4. I can sweep the floor. 5. I can help at home. 四、句型转换 1. I can't clean the room. 2. Can you sweep the floor? 3. Yes, I can. 4. No, I can't. 5. I can help at home. 五、判断句子正(T)误(F) 1.T 2.F 3.T 4.F 5.T 六、选词填空 1. help 2. clean 3. sweep 4. wash 5. cook 七、情景选择 1. A 2. B 3. A 4. A 5. A 八、改错 1. helps → help 2. cleaning → clean 3. do → can 4. washes → wash 5. Do → Can 学科网（北京）股份有限公司 $