高中英语情态动词讲解PPT课件.ppt

Grammar: Modal verbs;How many modal verbs do you know?;can could may might shall should must will would ought to;表示推测;He must have a car now.;　一定不，不可能 can’t couldn’t He can`t be at home. 　 He couldnt have said such a thing . 　　 　　他们一定不在图书馆读书。 　 　　约翰是很聪明的，他应该不会叫他儿子那样做。 　 ; ２．可能　肯定句 could , may ,might 　　　　　　否定句may \might not（可能不） 　　　　　　疑问句 can ,could 他可能正在睡觉。 　These students may / might have seen the film before.　　 否定句 　The boy may / might not be watching TV at home. （现在）这个男孩可能没在家看电视;疑问句 How could he have forgotten such an important thing?这么重要的事他怎么能忘了呢？ It`s so late. Where can she have gone? 天晚了，她可能去哪儿了呢？ Can you have left the watch at home?你会不会把表丢在家里呢？ ;Choose the best answers to complete the following sentences: 1. I thought you______ like something to read. So I have brought you some books.A. ought B. might C. could D. must 2. –That man must be Sarah`s husband.--No, he_____ be her husband. She is still single.A. can`t B. mustn`t C. may not D. ought to  3. Peter _____come with us tonight, but he isn`t very sure.A. must B. may C. can D. will; 4.–What____ it be? --It______ be a mail box, for it is moving.It______ be a car. A. can; can`t; must B. can; can; must C. can; mustn`t; must D. must; mustn`t; can 5. –Look, someone is coming. Guess__________ . --Jack. He`s always on time. A. who can it be B. who he may C. who he can be D. who it can be; 6. –I saw Mary in the library yesterday.--You_____ her. She is still abroad.A. mustn`t see B. can`t have seen C. mustn`t have seen D. couldn`t see 7. David, you _____play with the valuable bottle, you_______ break it.A. won`t; can`t B. mustn`t; mayC. shouldn`t; must D. can`t; shouldn`t 　 ;表示能力;can与be able to 用法区别常与句子时态有关 1.现在时比较 1) 表示”能力”时,be able to 不用于第二人称, You are able to do the work, I think. (X) 改用can can与感官动词feel, hear, see, smell, taste连用