1、精選優質文檔-傾情為你奉上情態動詞must 的用法1. must 表示必要性，“必須”（肯定句，疑問句常見） You must go to bed now. Must I start at once?2. 否定式mustnt 表示“禁止” You mustnt smoke here. We mustnt be late again. (不許我們再遲到了)3. 由must 引導一般疑問句時，肯定回答用must，否定回答用neednt 或dont have to.- Must I stay at home?- Yes, you must. / No, you neednt4. 當出現反問句式時，如

2、果其陳述部分must 表示“必須，有必要”時，反問句用neednt，如果其陳述部分mustnt 表示“禁止”，反問句用must. -You must go there, neednt you?- Yes, I must. / No, I neednt/dont have to. You mustnt go there, must you?5. must 表示推測時，有3種形式時， 反問句與must 后的動詞保持一致。 對現在的動作進行推測 You must be hungry now, arent you? You must have the wrong number. There is no

3、 such person, havent/ dont you? 對正在進行的動作進行推測He must be doing his homework, isnt he？ 對過去發生的動作進行推測 You must have read this book, havent you?It must have snowed yesterday, didnt you?6. must 用于反語，表示勸誡。-Must you make so much noise?(你非得吵這么大聲嗎？)-Sorry, Ill try not to.（2005全國卷）John, look at the time, _A_ yo

4、u play the piano at such a later hour? A. must B. can C. may D. need7. 與說話人的愿望相反，“偏偏，偏巧”。 I dont want to be late, but my car must break down on half way. (2004 天津) -Who is standing over there?-well, if you _C_ know, the girl is Marry.A. may B. can C. must D. shall Why must it rain on Sunday?8. must

5、not (always) be doing. “不應該，一定不要”. always 加重不贊成的語氣。You mustnt always be talking so much.When you learn a foreign language, you mustnt always be translating everything into your own.Must用法專練一、單選1.John, look at the time. _ you play the piano at such a late hour? (2005)A. Must B. Can C. May D. Need2. H

6、e _ have completed his work; otherwise, he wouldnt be enjoying himself by the seaside.A. should B. must C. wouldnt D. cant3.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 don

7、e 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. Accordi

8、ng to the local regulations, anyone who intends to get a drivers 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

9、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. Its not difficult after all.A. should B. could C. must D. might11. -Guess what! I have got A for my

10、 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. wouldnt B. neednt C. mustnt D. darent13. We _ keep a cool head on overheating development, for it _ have negative influence

11、 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. -Its hard to believe t

12、hat Jack _ have fought with the policeman. -Yes. If one _ ask for trouble, it cant be helped.A. would; will B. must; may C. should; must D. need; dare 16. I dont 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. wont B. mustnt C. should D. shall二、用must正確形式填空1. You must go there right now, _?2. You must finish the work on time, _?3. We mustnt be late, _?4. Parents mustnt show too much concern for their children