资源简介 (共20张PPT)单元语法沙龙Unit 4 Being a good learner写出下列句子中的情态动词1. She should see a doctor if she doesn’t feel well. ________2. He may come or he may not. ________3. We must follow the safety regulations. ________4. She can dance very well. ________5. May we be excused from the meeting ________6. You mustn’t touch the exhibits in the museum. ________shouldmaymustcanMaymustn’t情态动词情态动词表示说话人对所诉动词或状态的态度或看法。情态动词一般没有人称和数的变化,在句中不能单独作谓语,必须和动词原形连用。表示否定时,在其后面加not;表示疑问时,将它提到句首。常见的情态动词有:can、could、may、might、must、need、shall、should、will、would 等。考点1 情态动词的用法情态动词 意义 用法 例句should 应该 表示义务或职责 We should follow the traffic rules. 我们应该遵守交通规则。应该 表示劝告、建议,用于主语为第二人称的句子。 You should study hard.你应该努力学习。情态动词 意义 用法 例句should 应该 表示征求同意或征询意见,用于主语为第一人称的疑问句。 What should I do to solve this problem 我应该怎么解决这个问题?应该 表示推测时,把握性比较大。 He should be at home because he is ill. 他应该在家,因为他生病了。情态动词 意义 用法 例句can/ could 能;会 表示能力(could 表示过去的能力) Jack can draw, and his sisters can swim. 杰克会画画,他的姐姐们会游泳。情态动词 意义 用法 例句can/ could 能;可以 表示请求或许可(could 语气更委婉),如果表示允许某人做某事,要用can 而不用could。 Can I have a glass of water 我可以喝杯水吗?情态动词 意义 用法 例句can/ could 可能 表示推测,多用于疑问句或否定句中,can’t 意为“不可能”。 Can the news be true It seems so unbelievable. 这个消息会是真的吗?它似乎太难以置信了。It can’t be true. 这不可能是真的。情态动词 意义 用法 例句may/ might 可以 用于肯定句中,表示许可,比can 正式。 Students may borrow up to five books from the library at a time. 学生们一次最多可以从图书馆借五本书。情态动词 意义 用法 例句may/ might 可以 用于疑问句中,表示请求,might 语气更委婉。 May I join in the volunteer program on weekends 我可以在周末参加这个志愿者项目吗?情态动词 意义 用法 例句may/ might 可能 表示推测,一般用于肯定句中, might 可能性低于may。 It may rain tomorrow, so you’d better take an umbrella with you. 明天可能会下雨,所以你最好带上一把雨伞。情态动词 意义 用法 例句must 必须 表示义务或责任。 You must wear a seat belt in the car. 在车里你必须系安全带。肯定 表示肯定的推测,仅用于肯定句。 He must be at school because his bike is here. 他一定在学校,因为他的自行车在这儿。记忆口诀情态动词的用法should 表应该,建议义务在,推测按常理,把握比较大。can 有能力意,请求许可行,否定疑表可能,口语常运用。may 许可特礼貌,正式场合妙,也许表可能,肯否都用到。must 表必须,禁止用 mustn't,肯定表推测,语气很笃定。敲黑板 mustn’t表示禁止。考点2 情态动词的特殊用法1. 回答由must 引出的一般疑问句时,肯定回答用must;否定回答常用need not,或don’t have to,而不用must not。·—Must I finish the work today 我必须今天完成工作吗?·—Yes, you must./No, you needn’t./ No, you don’t have to. 是的,你必须。/ 不,你不必。2. 回答由may 引出的一般疑问句,肯定回答有:Yes, you may./Yes, of course./Yes, certainly./ Sure. 等;否定回答有:No, you mustn’t./No, you can’t. 等。·—May I use your dictionary 我可以用一下你的词典吗?—Yes, you may. Here you are. 是的,你可以。给你。·—May I park my car here 我可以把我的车停在这儿吗?—No, you mustn’t. This is a no-parking zone.不,你不可以。这是禁停区。一 单项选择1. With the help of modern technology, now people _____ enjoy the proudest moment when China’s first astronaut Yang Liwei entered space.A. may B. can C. should D. must2. [无锡] Shh... ! This is a library. You _____ keep your voice down.A. can B. can’t C. should D. shouldn’tBC3. When you make a fresh salad, you _____ add your favorite fruit if you would like to.A. may B. should C. must D. have to4. —People _____ wear helmets(头盔)when they ride e-bikes according to the traffic rules.—Yes, or they will be punished.A. must B. can C. may D. mightAA5. [河北] —Look! Is that girl Alice —No, it _____ be her. She is on a tour in Beijing now.A. can B. can’t C. must D. mustn’t6. [北京] —Bill, _____ I use your ruler —Of course you can. Here you are.A. can B. must C. need D. shouldBA二 短文填空It’s Monday morning. Jack knows he 7. ________ (must / can) get up early for school. When he gets to the classroom, he finds his desk in a mess. He thinks he 8. ________ (should / can) clean it up right away.In the English class, the teacher says, “You 9. ________ (must / may) pay attention to the grammar rules. And you 10. ________ (can / may) ask me if you have any questions.”mustshouldmustcanAfter class, Jack wants to borrow a dictionary from his classmate. He asks“, 11. ________ (May / Can) I use your dictionary ” His classmate says,“ Sure, you 12. ________ (should / may).”At lunchtime, Jack sees his friend eating junk food. He tells him, “You 13. ________ (shouldn’t / can’t) eat too much of that. It’s not good for you.”It’s a busy but meaningful day. Jack hopes he 14. ________ (can / may) do better in his studies tomorrow.Maymayshouldn’tcan 展开更多...... 收起↑ 资源预览