must的用法及练习.docx

细心整理情态动词must 的用法1. must 表示必要性，“必需”〔确定句，疑问句常见〕① You must go to bed now.② Must I start at once?2. 否认式mustn’t 表示“制止”① You mustn’t smoke here.② We mustn’t be late again. (不许我们再迟到了)3. 由must 引导一般疑问句时，确定答复用must，否认答复用needn’t 或don’t have to.---- Must I stay at home?---- Yes, you must. / No, you needn’t4. 当出现反问句式时，假如其陈述局部must 表示“必需，有必要”时，反问句用needn’t，假如其陈述局部mustn’t 表示“制止”，反问句用must.① ----You must go there, needn’t you?---- Yes, I must. / No, I needn’t/don’t have to.② You mustn’t go there, must you?5. must 表示推想时，有3种形式时， 反问句与must 后的动词保持相同。

⑴ 对此时此刻的动作进展推想① You must be hungry now, aren’t you?② You must have the wrong number. There is no such person, haven’t/ don’t you?⑵ 对正在进展的动作进展推想He must be doing his homework, isn’t he？⑶ 对过去发生的动作进展推想① You must have read this book, haven’t you?②It must have snowed yesterday, didn’t you?6. must 用于反语，表示劝诫Must you make so much noise?(你非得吵这么大声吗？)-----Sorry, I’ll try not to.〔2005全国Ⅲ卷〕John, look at the time, __A__ you play the piano at such a later hour? A. must B. can C. may D. need7. 与说话人的愿望相反，“偏偏，偏巧”。

① I don’t want to be late, but my car must break down on half way. (2004 天津)② ----Who is standing over there?----well, if you __C____ know, the girl is Marry.A. may B. can C. must D. shall③ Why must it rain on Sunday?8. must not (always) be doing. “不应当，必需不要”. always 加重不赞成的语气①You mustn’t always be talking so much.②When you learn a foreign language, you mustn’t always be translating everything into your own.Must用法专练一、单项选择1.John, look at the time. ______ you play the piano at such a late hour? (2005)A. Must B. Can C. May D. Need2. He _____ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside.A. should B. must C. wouldn’t D. can’t3.I was on the highway when this car went past followed by a police car. They ______ at least 150 kilometers an hour.A. should have been doing B. must have been doingC. could have done D. would have done4. ----Tom is never late for work. Why is he absent today? ----Something _____ to him.A. must happen B. should have happened C. could have happened D. must have happened5.This cake is very sweet. You ______ a lot of sugar in it.A. should B. could have put C. might put D. must have put6. According to the local regulations, anyone who intends to get a driver’s license______ take an eye test.A. can B. must C. would D. may7. ----- Must he come to sign this paper himself? ---- Yes, he ______.A. need B. must C. may D. will8. ----- May I smoke here? ---- If you _____, choose a seat in the smoking section.A. should B. could C. may D. must9. In crowded places like airports and railway stations, you _____ take care of your luggage.A. can B. may C. must D. will10. ----She looks very happy. She ______ have passed the exam. ---- I guess so. It’s not difficult after all.A. should B. could C. must D. might11. ----Guess what! I have got A for my term paper. ----Great! You _____ read widely and put a lot of work into it.A. must B. should C. must have D. should have12. When I was young, I was told that I ______ play with matches.A. wouldn’t B. needn’t C. mustn’t D. daren’t13. We ______ keep a cool head on overheating development, for it _____ have negative influence upon national economy.A. should; must B. must; would C. might; could D. must; may14. ---- ______ I book a table for dinner a few days ahead of time? ----Yes, you _______. The restaurant is always full, especially during the holidays.A. Must; will B. Must; can C. Shall; shall D. Shall; must15. ----It’s hard to believe that Jack _____ have fought with the policeman. ---Yes. If one _____ ask for trouble, it can’t be helped.A. would; will B. must; may C. should; must D. need; dare 16. I don’t want to be late, but my car _______ break down on half way.A. must B. can C. may D. will17. Jonney, you ______play with the knife. It is dangerous.A. won’t B. mustn’t C. should D. shall二、用must正确形式填空1. You must go there right now, _______?2. You must finish the work on time, ____________?3. We mustn’t be late, __________?4. Parents mustn’t show too much concern for their children, __________?5. He must be a worker, _________?6. You must have studied English for many years, ____________?7. She must have arrived there yesterday, _________________?8. -----Must we go now? -------- __________________.(肯/否认答复)9. You _______ always be talking so much?。