摘要:
**基本信息**
聚焦情态动词can用法及相关搭配,构建“规则-句型-应用”三层方法体系,系统提升语言理解与表达能力,培养规范学习策略。
**专项设计**
|模块|题量/典例|方法提炼|知识逻辑|
|----|-----------|----------|----------|
|核心语法精讲|3大语法点(含3句型/5动词短语)|can三规则(无人称变化/后接原形/否定can't)+固定搭配at home|从含义到规则,再到句型应用,结合动词短语形成语法链|
|语法专项精练|4类题型(40题)|句型转换四步法+改错双要点(原形/at home)|分层覆盖基础运用、规则辨析、错误修正,强化知识迁移|
内容正文:
外研版四年级上册Unit 2 Helping at home单元核心语法精讲精练
一、单元核心语法精讲(必考重点)
核心语法一:情态动词 can 用法(单元重中之重)
1.基本含义
can 是情态动词,表示“能够、会”,用来表达某人具备某项能力、可以做某事,本单元主要用于描述居家劳动能力。
2.核心语法规则(必考)
①can 无人称和数的变化,所有人称(I/you/he/we/they)后都直接用 can;
②can 后面必须加动词原形,不加 s、ing、to;
③否定形式:can’t = cannot(不能、不会)。
3.三大基础句型
①肯定句:主语 + can + 动词原形 + 其他.
例句:I can clean the room. 我会打扫房间。
②否定句:主语 + can’t + 动词原形 + 其他.
例句:I can’t cook dinner. 我不会做晚饭。
③一般疑问句:Can + 主语 + 动词原形 + 其他?
肯定回答:Yes, 主语 + can. 否定回答:No, 主语 + can’t.
例句:— Can you wash clothes? 你会洗衣服吗?— Yes, I can.
核心语法二:介词 at 固定搭配
本单元固定短语:at home(在家)
语法要点:表示“在家劳作、在家活动”,只能用介词 at,是固定搭配,不能用 in/on。
例句:I can help my family at home. 我可以在家帮家人干活。
核心语法三:动词短语搭配(单元固定搭配)
全部为动词原形短语,直接搭配 can 使用:
clean the room 打扫房间、wash clothes 洗衣服、cook dinner 做晚饭、set the table 摆餐具、help people 帮助他人
二、语法专项精练(分层刷题)
题型一:用 can / can’t 填空(每空2分,共20分)
1.I ________ wash clothes. I learn it now.
2.Tom ________ cook dinner. He is only 10 years old.
3.My mother ________ clean the room every day.
4.— ________ you set the table? — Yes, I can.
5.I ________ help my family at home. It’s easy.
6.Lucy ________ wash clothes, but she can clean the room.
7.We ________ help old people. We are good kids.
8.My brother ________ cook, but my sister can.
9.________ your father help at home?
10.I ________ do housework(做家务). I like it.
题型二:单项选择(每空3分,共30分)
( ) 1. I can ________ the room.
A. cleans B. clean C. cleaning
( ) 2. — Can you wash clothes? — ________
A. Yes, I do. B. No, I can’t. C. No, I don’t.
( ) 3. My sister can help my family ________ home.
A. at B. in C. on
( ) 4. He ________ cook dinner, but I can.
A. can’t B. can C. is
( ) 5. — ________ you set the table? — Yes, I can.
A. Do B. Can C. Are
( ) 6. We can ________ people.
A. help B. helps C. helping
( ) 7. My mum can ________ clothes.
A. washes B. wash C. washing
( ) 8. I ________ do housework at home.
A. can B. am C. is
( ) 9. — Can your brother clean the room? — ________
A. Yes, he can. B. Yes, I can. C. No, he don’t.
( ) 10. Tom ________ help his family at home.
A. can B. cans C. canes
题型三:句型转换(每空3分,共30分)
1. I can clean the room.(改为否定句)
I ________ ________ the room.
2. I can wash clothes.(改为一般疑问句)
________ ________ wash clothes?
3. Can you set the table?(作肯定回答)
________, ________ ________.
4. Can he cook dinner?(作否定回答)
________, ________ ________.
5. She can help her family.(改为一般疑问句)
________ ________ help her family?
题型四:语法改错(圈出错误并改正,每空2分,共20分)
1. I can washes clothes. ________
2. Can you cleans the room? ________
3. He can’t to cook dinner. ________
4. I help my family in home. ________
5. She can helping people. ________
参考答案+语法解析
题型一:用 can / can’t 填空
1. can 2. can’t 3. can 4. Can 5. can
6. can’t 7. can 8. can’t 9. Can 10. can
解析:结合句意判断能力,会做用can,不会做用can’t,疑问句开头用Can。
题型二:单项选择
1. B(can后接动词原形)
2. B(can引导问句,用can/can’t回答)
3. A(固定搭配at home)
4.A(转折词but表对比,前后相反)
5.B(答句含can,问句用Can提问)
6.A(can后接动词原形)
7.B(can后接动词原形)
8.A(can表能力)
9.A(主语为he,回答主语保持一致)
10.A(can无人称变化,无cans/canes形式)
题型三:句型转换
1. can’t clean
2. Can you
3. Yes, I can
4. No, he can’t
5. Can she
题型四:语法改错
1.wash
2.clean
3.cook
4.at
5.help
核心改错总结:can 后永远接动词原形;在家固定搭配 at home。
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