Unit 6 语法讲解及习题：情态动词can, should, must & 感叹句 2025-2026学年沪外教版英语七年级上册

沪外教版英语七上Unit6语法讲解及习题 情态动词can, should, must & 感叹句What/How...! 一、语法详细讲解 结合沪外教版七上Unit6 "Inventors and their inventions" 教材内容,本单元核心语法为 情态动词can, should, must 和 感叹句What/How...!,用于表达能力、义务、建议和强烈情感。 语法点一:情态动词 can, should, must 1. can(能、可以、会) 核心功能:表示能力、许可或可能性。 例句: She can play the piano beautifully.(她能优美地弹钢琴。——能力) You can turn on the air conditioner.(你可以开空调。——许可) It can rain anytime in the evening.(晚上随时可能下雨。——可能性) 否定形式:cannot / can't(不能) 2. should(应该) 核心功能:表示建议、责任或正确的做法。 例句: Scientists think we should make more use of green energy.(科学家认为我们应该更多利用绿色能源。——建议) 否定形式:should not / shouldn't(不应该) 3. must(必须) 核心功能:表示必要性、义务或规定。 例句: We must be very quiet in the library.(我们在图书馆必须保持安静。——规定) "I must solve this problem," he thought.(“我必须解决这个问题,”他想。——必要性) 否定形式:must not / mustn't(禁止、不准) 语法点二:感叹句 What...! / How...! 1. What 引导的感叹句 结构: What a/an + (形容词) + 单数可数名词 (+ 主语 + 谓语)! 例:What a clever idea (it is)!(多么聪明的主意啊!) What + (形容词) + 不可数名词/复数名词 (+ 主语 + 谓语)! 例:What beautiful weather (it is)!(多么好的天气啊!) 2. How 引导的感叹句 结构: How + 形容词/副词 (+ 主语 + 谓语)! 例:How fast the rocket travels!(火箭飞得真快啊!) 例:How exciting the game is!(这场比赛真激动人心啊!) 二、语法专项习题 第一部分:情态动词专项 一、用 can/can't, should/shouldn't, must/mustn't 填空 1. You _ (can / must) be quiet in the reading room. It's a rule. 2. I _ (can / should) swim very well. I practice every day. 3. You _ (should / must) eat more vegetables. They are good for your health. 4. We _ (mustn't / can't) run in the hallway. It's dangerous. 5. It _ (can / should) be very cold in the mountains. Let's take warm clothes. 6. You _ (shouldn't / can't) spend too much time on computer games. 7. I _ (can / must) speak three languages: English, Chinese, and French. 8. We _ (must / should) protect the environment for our future. 9. You _ (can / must) not smoke in public places. It's against the law. 10. He _ (should / can) get more sleep. He looks very tired. 二、单项选择 11. —_ I borrow your pen? —Sure, here you are. A. Can B. Should C. Must D. Need 12. You _ be very careful when you cross the road. A. can B. should C. must D. may 13. We _ waste water. It is a precious resource. A. can't B. shouldn't C. mustn't D. won't 14. She _ play the violin when she was five. A. can B. could C. should D. must 15. You _ finish your homework before you watch TV. A. can B. should C. must D. may 16. It _ be sunny tomorrow. Let's go for a picnic. A. can B. should C. must D. will 17. You _ talk loudly in the hospital. A. can't B. shouldn't C. mustn't D. don't 18. He _ be at home. The light is on. A. can B. should C. must D. may 19. We _ help people in need. It's the right thing to do. A. can B. should C. must D. will 20. You _ drive so fast. It's very dangerous. A. can't B. shouldn't C. mustn't D. don't 第二部分:感叹句专项 一、句型转换 21. This is a very useful invention. _ _ useful invention this is! 22. The music sounds very beautiful. _ _ the music sounds! 23. He is a very clever inventor. _ _ clever inventor he is! 24. The children are playing happily. _ _ the children are playing! 25. It is very hot today. _ _ it is today! 二、单项选择 26. _ nice the weather is! Let's go to the park. A. What B. What a C. How D. How a 27. _ interesting story it is! I want to read it again. A. What B. What an C. How D. How an 28. _ fast he runs! No one can catch up with him. A. What B. What a C. How D. How a 29. _ beautiful flowers they are! A. What B. What a C. How D. How a 30. _ exciting news it is! A. What B. What an C. How D. How an 第三部分:综合填空 用 can, should, must, what, how 完成短文。 A Great Invention Dr. Spencer Silver was doing research on strong glues. But he got one that "stuck lightly to surfaces." At first, Silver had no idea what he 31. _ do with his discovery. Years later, Art Fry came to him with an idea. They created a bookmark that could stick to paper without damaging it. Finally, that bookmark became the sticky note. Now people 32. _ use sticky notes to remember things they 33. _ do. 34. _ an interesting accident! 35. _ lucky we are to have such a small invention! 三、答案及详细解析 第一部分:情态动词专项 一、填空 1. must 解析:图书馆保持安静是规定,用must。 2. can 解析:表示游泳的能力,用can。 3. should 解析:表示健康方面的建议,用should。 4. mustn't 解析:走廊奔跑很危险,是禁止行为,用mustn't。 5. can 解析:表示山上可能很冷,用can。 6. shouldn't 解析:表示不应该花太多时间玩游戏,用shouldn't。 7. can 解析:表示说三种语言的能力,用can。 8. should 解析:表示保护环境的责任和建议,用should。 9. mustn't 解析:公共场所吸烟是法律禁止的,用mustn't。 10. should 解析:表示建议他多睡觉,用should。 二、单项选择 11. A 解析:表示请求许可,用can。 12. C 解析:过马路小心是必须遵守的安全规则,用must。 13. B 解析:浪费水是不应该的行为,用shouldn't。 14. B 解析:when she was five表示过去,can的过去式是could。 15. C 解析:看电视前必须完成作业,是明确的要求,用must。 16. A 解析:表示明天可能天晴,用can。 17. C 解析:医院大声喧哗是禁止行为,用mustn't。 18. C 解析:灯亮着,推测他一定在家,用must。 19. B 解析:帮助有需要的人是正确的做法,用should。 20. B 解析:开太快是不应该的危险行为,用shouldn't。 第二部分:感叹句专项 一、句型转换 21. What a 解析:invention是单数可数名词,用What a。 22. How beautiful 解析:修饰形容词beautiful,用How。 23. What a 解析:inventor是单数可数名词,用What a。 24. How happily 解析:修饰副词happily,用How。 25. How hot 解析:修饰形容词hot,用How。 二、单项选择 26. C 解析:修饰形容词nice,用How。 27. B 解析:story是单数可数名词,interesting以元音音素开头,用What an。 28. C 解析:修饰副词fast,用How。 29. A 解析:flowers是复数名词,用What。 30. A 解析:news是不可数名词,用What。 第三部分:综合填空 31. could 解析:表示过去“能”做什么,用can的过去式could。 32. can 解析:表示现在人们“可以”使用便利贴,用can。 33. should 解析:表示人们“应该”做的事,用should。 34. What 解析:修饰名词accident,用What。 35. How 解析:修饰形容词lucky,用How。 ( 1 ) 学科网(北京)股份有限公司 $