must的用法及練習(xí)

1、 情態(tài)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(dǎo)一般疑問句時(shí)，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(dāng)出現(xiàn)反問句式時(shí)，如果其陳述部分

2、must 表示“必須，有必要”時(shí)，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(shí)，有 3 種形式時(shí)， 反問句與 must 后的動詞保持一致。 對現(xiàn)在的動作進(jìn)行推測 you must be hungry now, arent you? you must have the wrong number. there is no

3、 such person, haven t/ dont you? 對正在進(jìn)行的動作進(jìn)行推測he must be doing his homework, isnt he？ 對過去發(fā)生的動作進(jìn)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_

4、you play the piano atsuch 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. mayb. canc. mustd. shall why must it rain on sunday?8. must not

5、 (always) be doing. “不應(yīng)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 mustn t 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. he

6、 _ have completed his work; otherwise, he wouldn t be enjoying himself bythe seaside.a. shouldb. mustc. wouldntd. 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 doingc. could have doneb. must have been doingd. wo

7、uld have done4. -tom is never late for work. why is he absent today?-something _ to him.a. must happenb. should have happenedd. must have happenedc. could have happened5.this cake is very sweet. you _ a lot of sugar in it.a. should b. could have put c. might putd. must have put6. according to the lo

8、cal regulations, anyone who intends to get a driverslicense_ take an eye test.a. canb. mustc. wouldd. may7. - must he come to sign this paper himself?- yes, he _.a. need8. - 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 a

9、irports and railway stations, you _ take care of yourb. mustc. mayd. will luggage.a. canb. mayc. must d. will10. -she looks very happy. she _ have passed the exam.- i guess so. its not difficult after all.a. shouldb. couldc. mustd. might11. -guess what! i have got a for my term paper.-great! you _ r

10、ead widely and put a lot of work into it.a. must12. when i was young, i was told that i _ play with matches.a. wouldnt b. neednt c. mustnt d. darentb. shouldc. must haved. should have13. we _ keep a cool head on overheating development, for it _ havenegative influence upon national economy.a. should

11、; mustb. must; wouldc. might; couldd. 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; willb. must; canc. shall; shall d. shall; must15. -its hard to believe that jack _ have fought with the police

12、man.-yes. if one _ ask for trouble, it cant be helped.a. would; will16. 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. shallb. must; may c. should; must d. need; dare二、用 must 正確形式填空1.2. you must go there right now, _?3.4. you must finish the work on time, _?5. 6. we mustnt be late, _?7.8. parents mustnt show too much concern for their children, _?9.10. he