Unit 8 I can do this for you 单元语法专项-2026-2027学年上学期英语三年级上册（译林版三起新教材）

**基本信息** 聚焦情态动词can的系统训练，通过规则梳理-题型分层-易错警示构建三阶学习体系，强化语言应用与语法逻辑。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |核心知识点总结|6大板块|句型结构分类（肯定/否定/疑问）、必记规则（动词原形/无人称变化）、易错对比（too/either等）|从功能概念到句型结构，再到规则应用，形成"概念-结构-规则-词汇"逻辑链| |专项练习题|10类题型|基础辨析（can/can't填空）、语法输出（句型转换/汉译英）、综合运用（短文填空/情景对话）|由单一语法点到语用场景，覆盖"识别-应用-迁移"能力层级，适配单元复习需求|

Unit 8 I can do this for you 单元语法专项-2026-2027学年上学期英语三年级上册（译林版三起新教材） 第一部分 单元核心语法知识点总结 一、情态动词 can 核心概念 本单元核心语法是情态动词 can，用于表示某人"能、会、可以"做某事，谈论自己和他人的能力。can 没有人称和数的变化，后面必须跟动词原形。 语法项目 功能 教材原句示例 can 肯定句 表示 "能、会" 做某事 I can sing. / I can dance. / I can draw. / We can clean the table. can 否定句 表示 "不能、不会" I can't swim. / He can't dance. can 一般疑问句 询问 "会不会、能不能" Can you sing? — Yes, I can. / No, I can't. can 特殊疑问句 询问 "能做什么" What can you do? — I can draw a picture. too 表示 "也"，用于肯定句句末 I can sing too. / I can dance too. / We can clean the table too. for 表示 "为了、给" I can dance for you, Grandpa. / do things for the family 二、can 的四种基本句型结构 A 肯定句 结构 示例 主语 + can + 动词原形 + 其他 I can sing. / She can dance. / We can clean the table. 主语 + can + 动词原形 + for + 人 I can draw a picture for you. / I can dance for my grandpa. B 否定句 结构 示例 主语 + can't (cannot) + 动词原形 + 其他 I can't swim. / He can't sing. / They can't dance. C 一般疑问句及回答 结构 示例 Can + 主语 + 动词原形 + 其他？ Can you sing? / Can he draw? / Can they clean the table? 肯定回答 Yes, I can. / Yes, he can. / Yes, they can. 否定回答 No, I can't. / No, he can't. / No, they can't. D 特殊疑问句 结构 示例 What + can + 主语 + do? What can you do? — I can take pictures. What can + 主语 + do for + 人？ What can you do for your family? — I can clean the table. 三、can 的用法要点（必记规则） 规则 说明 示例 后接动词原形 can 后面永远用动词原形，不加 -s/-ing/-ed I can sing.（√） I can sings.（×） 无人称变化 不管主语是 I/you/he/she/it/we/they，can 形式不变 He can dance. / They can draw. 否定缩写 can not = cannot = can't I can't swim. = I cannot swim. 疑问句提前 变疑问句时 can 提到主语前 Can you sing?（√） You can sing?（×） too 的位置 too 表示 "也"，放在肯定句句末，前面用逗号隔开 I can sing too. / I can dance, too. 四、单元核心动作词汇（can 后必接的动词） 英文 中文 教材搭配 sing 唱歌 I can sing. / sing a song dance 跳舞 I can dance. / dance for you draw 画画 I can draw. / draw a picture take pictures 拍照 I can take pictures. clean the table 擦桌子 We can clean the table. sing a song 唱一首歌 I can sing a song for you. draw a picture 画一幅画 I can draw a picture for you. ⚠️ 五、高频易错警示 1. can 后接动词原形，不加 -s： 错误：He can sings. 正确：He can sing. 2. can 没有人称变化： 错误：She cans dance. 正确：She can dance. 3. 否定句用 can't，不用 don't can： 错误：I don't can swim. 正确：I can't swim. 4. 一般疑问句 can 提前： 错误：You can sing? 正确：Can you sing? 5. too 用于肯定句，否定句用 either： 错误：I can't swim too. 正确：I can't swim either. 6. What can you do? 中 do 不能省略： 错误：What can you? 正确：What can you do? 7. for 后面接人，表示"为某人"： 错误：I can dance to you. 正确：I can dance for you. 六、单元核心固定搭配 短语 中文 can sing 会唱歌 can dance 会跳舞 can draw 会画画 can take pictures 会拍照 can clean the table 会擦桌子 sing a song 唱一首歌 draw a picture 画一幅画 dance for you 为你跳舞 do things for the family 为家人做事 New Year's Day 元旦 Are you OK? 你还好吗？ I'm dizzy. 我头晕。 How lovely! 真可爱！ Great! 太棒了！ Thank you. 谢谢你。 I love you. 我爱你。 第二部分 语法专项练习题 练习一 用 can / can't 填空（基础夯实·情态动词辨析） 1. I ________ sing. I can sing a song for you. 2. He ________ swim. He is afraid of water. 3. — ________ you dance? — Yes, I ________. 4. We ________ clean the table for our family. 5. She ________ draw, but she ________ sing. 6. — Can they take pictures? — No, they ________. 7. I ________ draw a picture for you, Grandpa. 8. The bird ________ fly, but it ________ swim. 9. — ________ your brother sing? — Yes, he ________. 10. I ________ do things for my family. 练习二 用所给动词的适当形式填空（can 后接动词原形） 1. I can ________ (sing) a song for you. 2. She can ________ (dance) very well. 3. We can ________ (clean) the table after dinner. 4. Can you ________ (draw) a picture for me? 5. He can ________ (take) pictures for the family. 6. They can't ________ (swim) in the river. 7. My grandpa can ________ (cook) nice food. 8. Can she ________ (sing) an English song? 9. I can ________ (draw) a fox. 10. We can ________ (help) our mother at home. 练习三 按要求改写句子（句型转换核心训练） 1. I can sing.（改为否定句） _____________________________________________________________________ 2. He can dance.（改为一般疑问句，并作肯定回答） _____________________________________________________________________ 3. We can clean the table.（改为一般疑问句，并作否定回答） _____________________________________________________________________ 4. She can draw a picture.（对划线部分提问） _____________________________________________________________________ 5. They can take pictures.（改为否定句） _____________________________________________________________________ 6. Can you swim?（作否定回答） _____________________________________________________________________ 7. I can sing. I can sing too.（合并为一句） _____________________________________________________________________ 8. He can cook for his family.（对划线部分提问） _____________________________________________________________________ 9. They can clean the table.（用 she 改写句子） _____________________________________________________________________ 10. I can dance for you.（改为一般疑问句） _____________________________________________________________________ 练习四 句子改错（找出下列各句中的一处错误并改正） 1. He can sings well. ________ 改为 ________ 2. I can't to swim. ________ 改为 ________ 3. Can she dances? ________ 改为 ________ 4. They cans clean the table. ________ 改为 ________ 5. I can't sing, too. ________ 改为 ________ 6. What can you? ________ 改为 ________ 7. She can dance to you. ________ 改为 ________ 8. Can he draws a picture? ________ 改为 ________ 练习五 单项选择（语法辨析·易错点强化） （ ）1. I ________ sing a song for you. A. can B. cans C. am （ ）2. — Can you dance? — ________ A. Yes, I do. B. Yes, I can. C. No, I don't. （ ）3. She ________ swim. She is afraid of water. A. can B. can't C. isn't （ ）4. — What can you do? — ________ A. I can draw. B. I like drawing. C. Yes, I can. （ ）5. We can ________ the table for our family. A. cleans B. cleaning C. clean （ ）6. I can sing. My sister can sing ________. A. to B. too C. two （ ）7. — ________ can you do for your family? — I can clean the table. A. What B. Who C. Where （ ）8. He can ________ pictures. A. take B. takes C. taking （ ）9. — Can they draw? — No, ________. A. they can B. they can't C. they don't （ ）10. I can dance ________ my grandpa. A. to B. for C. of （ ）11. — Can your mother cook? — Yes, ________. A. she can B. he can C. she can't （ ）12. The rabbit ________ run fast, but it ________ fly. A. can; can B. can't; can C. can; can't （ ）13. I ________ draw a fox. It's you! A. can B. can't C. am （ ）14. — Are you OK, Bobby? — Oh, ________ dizzy. A. I B. I'm C. I can （ ）15. We ________ do things for our family. A. can B. cans C. are （ ）16. — Can you sing an English song? — ________ A. Yes, I am. B. Yes, I can. C. No, I'm not. （ ）17. She can ________ a picture for you. A. draw B. draws C. drawing （ ）18. — ________! Thank you. A. Great B. Greatly C. Be great （ ）19. I can't swim. My brother can't swim ________. A. too B. either C. also （ ）20. It's New Year's Day. The children want to do things ________ the family. A. for B. to C. of 练习六 根据汉语提示完成句子（汉译英语法输出） 1. 我会唱歌。 I ________ ________. 2. 我也会跳舞。 I ________ dance ________. 3. 你会画画吗？ ________ you ________? 4. 我们会擦桌子。 We ________ ________ the table. 5. 他不会游泳。 He ________ ________. 6. 我能为爷爷跳舞。 I ________ dance ________ my grandpa. 7. 你会做什么？ ________ ________ you ________? 8. 她会拍照。 She ________ ________ pictures. 9. 我能为你画一幅画。 I ________ ________ a picture ________ you. 10. 孩子们想为家人做事。 The children want to ________ things ________ the family. 练习七 句型综合改写（灵活运用训练） 1. 将句子改为否定句：I can sing a song. _____________________________________________________________________ 2. 将句子改为一般疑问句：She can dance for you. _____________________________________________________________________ 3. 对划线部分提问：He can draw a picture. _____________________________________________________________________ 4. 用 too 改写句子：I can sing. She can sing. _____________________________________________________________________ 5. 用 can 改写句子：He is good at swimming. _____________________________________________________________________ 6. 用 we 改写句子：I can clean the table. _____________________________________________________________________ 7. 作肯定回答：Can you take pictures for the family? _____________________________________________________________________ 8. 用 What 提问并回答：I can draw a fox. _____________________________________________________________________ 练习八 从Ⅱ栏中选出Ⅰ栏句子的正确答语（交际运用） Ⅰ 栏 Ⅱ 栏 （ ）1. What can you do? A. Yes, she can. （ ）2. Can you dance? B. I can sing. （ ）3. Can she draw? C. No, I can't. （ ）4. I can sing. D. Great! （ ）5. Let's clean the table. E. I can sing too. 练习九 短文填空（语法运用·用 can / can't 或所给词适当形式填空 共2篇） Passage 1（基础篇·贴合教材 Story time·元旦表演） It's New Year's Day. The children want to do things for the family. "I 1. ________ sing," says Liu Tao. "I 2. ________ sing too," says his cousin. "I 3. ________ take pictures," says Liu Hao. "Great!" "I 4. ________ dance," says the girl. "I 5. ________ dance too," says the boy. "How lovely!" "I 6. ________ draw," says Liu Tao. "I 7. ________ draw too," says his cousin. "Look! This is my picture." "We 8. ________ clean the table," say the children. "We 9. ________ clean the table too." "Great! Thank you." They 10. ________ (be) happy together. Passage 2（提升篇·贴合教材 Cartoon time·Bobby 和爷爷） Bobby loves his grandpa. He wants to do things for him. "I 1. ________ dance for you, Grandpa," says Bobby. He dances and dances. "Are you OK, Bobby?" "Oh, I 2. ________ (be) dizzy..." "Grandpa, I 3. ________ draw a picture for you." Bobby draws a picture. "Er, 4. ________ this a fox?" "No, it's you! Ha ha!" "Thank you, Bobby. I love you." "I love you too, Grandpa." Bobby 5. ________ (can) sing, but he 6. ________ (can) sing well. He 7. ________ (can) dance, but he is dizzy after dancing. He 8. ________ (can) draw funny pictures. He 9. ________ (can) do many things for his grandpa. He 10. ________ (be) a good boy. 练习十 情景交际补全对话（语法+交际综合运用） 从方框中选择合适的句子补全对话，有两项多余。 ( A. I can dance too. B. What can you do? C. Can you sing? D. Great! E. I can draw a picture for you. F. Yes, I can. G. We can clean the table. ) A: It's New Year's Day. Let's do things for our family. 1. ____ B: I can sing. A: 2. ____ B: Yes, I can sing a song for you. A: 3. ____ B: Can you dance? A: 4. ____ B: How lovely! A: Look! 5. ____ B: Thank you! It's beautiful. 参考答案 练习一 用 can / can't 填空 1. can 2. can't 3. Can; can 4. can 5. can; can't（或 can't; can） 6. can't 7. can 8. can; can't 9. Can; can 10. can 练习二 用所给动词的适当形式填空 1. sing 2. dance 3. clean 4. draw 5. take 6. swim 7. cook 8. sing 9. draw 10. help 练习三 按要求改写句子 1. I can't sing. 2. Can he dance? Yes, he can. 3. Can we clean the table? No, we can't. 4. What can she do? 5. They can't take pictures. 6. No, I can't. 7. I can sing, and I can sing too.（或 I can sing too.） 8. What can he do for his family? 9. She can clean the table. 10. Can you dance for me? 练习四 句子改错 1. sings → sing 2. to swim → swim 3. dances → dance 4. cans → can 5. too → either 6. you → you do 7. to → for 8. draws → draw 练习五 单项选择 1.A 2.B 3.B 4.A 5.C 6.B 7.A 8.A 9.B 10.B 11.A 12.C 13.A 14.B 15.A 16.B 17.A 18.A 19.B 20.A 练习六 根据汉语提示完成句子 1. can sing 2. can; too 3. Can; draw（或 sing/dance） 4. can clean 5. can't swim 6. can; for 7. What can; do 8. can take 9. can draw; for 10. do; for 练习七 句型综合改写 1. I can't sing a song. 2. Can she dance for you? 3. What can he do? 4. I can sing. She can sing too. 5. He can swim. 6. We can clean the table. 7. Yes, I can. 8. What can you draw? I can draw a fox. 练习八 从Ⅱ栏中选出Ⅰ栏句子的正确答语 1.B 2.C 3.A 4.E 5.D 练习九 短文填空 Passage 1 1. can 2. can 3. can 4. can 5. can 6. can 7. can 8. can 9. can 10. are Passage 2 1. can 2. am 3. can 4. is 5. can 6. can't 7. can 8. can 9. can 10. is 练习十 情景交际补全对话 1.B 2.C 3.D 4.A 5.E ( 第 1 页 共 14 页 ) 学科网（北京）股份有限公司 $