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1、情态动词专项练习1. Jean have kept his promise. I wonder why he changed his idea.A. must B. shouldC. needD. would解析：选B. “should have +过去分词”表示“过去本来应该（但没能）做某事”；keep one s promise 意为 信守诺言。2. Jane have come to the party, but she not find the exact time.A. could; couldB. might; couldC. should; couldD. should; wou
2、ld解析：选A. “ could have+过去分词表示过去本来应该（但没能）做某事”。3. So many mistakes in your homework! You more careful.A. may beB. had toC. would be D. should have been解析：选 D. You should have been more careful .意为：你本来应该更细心的。4. Her brother be at home now, because he was seen playing basketball in the stadium just now.A.
3、 mustn t B. needn tC. can tD. shouldnt解析：选 C. can t be at home 意为：不可能在家。5. - I can t understand why our boss is late.-He the early bus.A. could missB. may have missedC. can have missedD. might miss解析：选B. “may have+过去分词”表示对过去动作的判断，意为：可能做了某事。注意：can表示可能时，只能用于疑问句和反问句。6. She didnt answer the phone, she a
4、sleep.A. may beB. must be C. should have beenD. must have been解析：选D.表示：对过去发生的事情的肯定推测。7. The little girl s eyes were red. She.A. may cryB. must cry C. must be cried D. must have been crying解析：选D.意为：她刚才肯定一直在哭。对过去某事正发生的推测。8. He his supper now, for the dining hall is still closed.A. can t be havingB. ne
5、edn t be havingC. mustn t be havingD. shouldnt be having解析：选A.对现在正在发生的事情的否定推测。9. I parked my bike behind the building, but now it is gone. It.A. may be stolenB. must be stolenC. must have been stolenD. must have stolen解析：选C.对过去发生的事情的肯定推测的被动式。10. Mr. Black go to work by ferry before the bridge was bu
6、ilt?A. Did; used toB. Use; toC. Did; use toD. Does; use to解析：选 C. used to do的疑问式，可以是 Used+主语+to do ?或Did +主语+use to do?11. The hotel is only a stone s throw away, you take a bus.A. need not toB. not need toC. dont needD. need not解析：选D.说话人认为不必要乘车，need为情态动词。12. I am busy now,my brother do it for you ?
7、A. WillB. ShallC. MustD. May解析：选B.在疑问句中shall用于第三人称，也表示征求意见。13. - You needn t do it right now, need you?-Yes I am afraid I.A. needB. needn t C. mustD. mustn t解析：选C. Yes的意思是：不。意为：恐怕我必须现在就做。14. My English-Chinese dictionary has disappeared . Who have taken it?A. shouldB. mustC. couldD. would解析：选 C. cou
8、ld/can have done用于否定推测和疑问推测。15. -The room is so dirty.we clean it?-Of course.A. WillB. ShallC. WouldD. Do解析：选B. shall 用在疑问句中，常用于第一，三人称，表示征求意见或请求指示。16. If you have something important to do, you waste any time.A. needn t B. mustn t C. may notD. won t解析：选B.根据句意用 mustn t17. If you want to borrow a foot
9、ball after school, your student card here.A. has to leaveB. must leaveC. has to be leftD. must be left 解析：选 C. have to 表示客观需要， must 表示主观需要。学生证必须放在此是客观需要。18. “ Did you scold him for his carelessness? ”“ Yes, but it ”A. I d rather not doB. I d rather not have doneC. I shouldn t doD. I d better not do解
10、析：选 B. would rather 加完成时表示对完成了的或过去了的事情的态度。意为：当时是不情愿做的。19. “ Don t get near to it . It is too dangerous!”A. Yes, I won tB. No, I don tC. No, I can tD. No, I won t解析：选D. A为错误的表达方式；B和C没有直接回答对方的问候。20. He must be in the classroom, he?A. mustn tB. can tC. isn tD.can解析：选 C. 对表否定的 must 进行反意疑问时，要用句子的实义动词21.
11、Hebe in the garden. He must be in the room.A. can tB. mustn tC. will notD. may not解析：选 A. 否定推测用 cant 不用mustn t22. “ Do you have to leave now? ”“ I am very sorry, but I really.”A. can tB. haveC. shouldD. must解析：选 D. 回答 have to 的疑问句用 must 作肯定回答。23. “ Let s go to the library, shall we? ” “?”A. No, I ca
12、n tB. Yes, I willC. Yes , thank youD. No, we d better not解析：选 D. A,B,C 都 不能回答 shall we, 此处D 的语气比较婉转客气。24. “ Can I take it away? ”“ You better not. ”A. shouldB. couldC. wouldD. had解析：选 D. had better 与不带 to 的不定式构成谓语，可以变成疑问句：Hadn t you better25. You have brought your camera. They all had theirs with th
13、em.A. couldn tB. needn tC. wouldn tD. mustn t解析：选 B. 本来不必要做某事.26. See who is there!it be May?A. MayB. MustC. CanD. Will解析：选 C. 表推测时 A， B 都用作疑问句。27. Johnbe a basketball player. He is much too short.A. mayB. mustn tC. can tD. should解析：选 C. 断然的不定推测用can t28. The Chinese teacher looks so pale. She be ill
14、.A. mustB. mustn tC. canD. need解析：选 A. 表示有把握的肯定推测用 must29. Somethingto save our earth. Do you think so?A. can doB. must doC. has to doD. must be done解析：选 D. “ something must be done ” 意为：必须采取措施。30. Look at what you have done! You be more careful.A. oughtB. canC. wouldD. should解析：选 D. ought 后应用 to31.
15、 Has Li Lin started? He said he would join in the party. He . He is a man of keeping his word.A. could have leftB. must have leftC. can t comeD. won t be coming解析：B。从He is a man of keeping his word中可以看出，李林肯定已经出发来参加聚会了，这是对已经发生的事情非常肯定的推测，故用 must have done 。注意 must 表推测时，不能用于否定句和疑问句中。32. May I park my car here? No, you . No car is allowed to park here.A. may not B. needn t C. mustn t D. daren t解析：C。 此题考查以情态动词提问的一般疑问句的回答。 在英语中， 以某些情态动词提问的句子， 出于礼貌委婉或句意的需 要，回答时， 要换用另一个
