1. -There were already five people in the car but they managed to take me as well.

-It ________ a comfortable journey. A. can't be B. shouldn't be C. mustn't have been D. couldn't have been 答案选 D. 不可能是很舒服的。有 were 提示说明发生在过去 ,

否定式表示对过去情况的推测，意为： " 决不会…；决不可能… ".

2. Loudspeakers were fixed in the hall so that everyone ___ an opportunity to hear the speech. A. ought to have B. must have C. may have D. should have 答案选 D. so that 引导的目的状语从句 , 与情态动词的搭配有 : so that + 主语 +may, might, shall, should 等 .should 和 ought to 意思接近但 should 口气上带有更多的主观信心。 因为主句是过去时 , 所以 D 符合题意 .

3. “You___ borrow my notes provided you take care of them,” I told my friend.

A. could B. should C. must D. can 答案选 D. provided （ that ） + 从句表示一种假设条件，相当于 i

f 。根据情况可用虚拟语气或是陈述语气 , 这里表示真实的条件句 . 英语中表示“许可 / 建议”，在口语中常用can/may ，而不用 could/might. 这里正是口语中的给与“许可”，故选择 D.

4. Aren’t you tired? I ___ you had done enough for today.

A. should have thought B. must have thought C. might have thought D. could have thought 答案选 A. “should +have+ done ” 意思是“本来应该做某事 ,

而实际没做” , 符合此处 语义逻辑关系 “must+ have+ done” 表示对过去事情的肯定推测，

译成“一定做过某事” , 只用于肯定句 might+have+done” 表示对过去事情的推测 ,might 与 may 意思相同 , 但可能性更小 , 多用于虚拟语气中

5. He ____ unwisely, but he was at least trying to do something helpful. A. may have acted B. must have acted C. should act D. would act

A. 情态动词 +have done 用来表示对过去事实的推测 , may 与 must 在肯定程度上有很大的区别 . 此处选 may 最合适 .

6. You _____ Mark anything. It was none of his business. A. needn’t have told B. needn’t tell C. mustn’t have told D. mustn’t tell 答案选 A. 表示本没有必要做而做了 .

7 ． Lucy’s gone to school but her bike’s still here. She ___ by bus. A. must have gone B. should have gone C. ought to have gone D. could have gone

答案选 A 。 must 用在肯定句中表示较有把握的推测，意为“一定”。当 must 后接完成时的时候，表示对已发生的事情的推测。根据句意，此处是比较有把握的推测，故选 A 。

8 ． He ____ sixty or so when I first met him in a park. A. had been B. must be C. has been D. must have been

D. 情态动词 must 可用于表示很有把握的推断 . 对于现在事情的肯定推断 , 用 must do; 而对于过去的推断 , 用 must have done. 本句是对他过去年龄的肯定判断 , 故选 D.

9 ． I wonder who drank all the milk yesterday. It ___ have been Peter because he was out all day.A. mustn’t B. can’t C. won’t D. needn’t

B. can’t 是表示肯定推测的 must 的否定形式 , 表示“不可能 , 不会是” .

10 ． You ____ park here. It’s an emergency exit for the fire bridge. A. mustn’t B. needn’t C. wouldn’t D. oughtn’t

答案选 A. 表示“禁止 , 一定不能” .

11. Pauline ______ in the laboratory for days and nights until the experiment is finished. A. will stay B. stays C. is staying D. have stayed 答案应选择 A Will 是对某些习惯性事态的推测。

12.If your main parachute( 降落伞 ) _______ fail to open, your second one will open automatically.

A. should B. will C. can D. may 答案应选择 A Should 是对不确定事情的一种猜测，表示 uncertaint

y

13. Oil _______ on water. A. should float B. can float C. will float D. may floa

t 答案应选择 C 对某些不受时限的客观过程的推测，只用 will ，表

示现在时间，可与一般现在是的类似用法交替使用。本句可改写为 Oil floats on water 。

14. I went there in 1984, and that was the only occasion when I _____ the journey in exactly two days.

A. must take B. must have made C. was able to make D. could make.

答案应选择 C can 表示一般性的能力，而 be able to 可以特指某

一次能够。15. If you _____ kindly wait here a minute, I’ll ring the

director’s office. A. will B. would C. shall D. can 答案应选择 B Will 用于第二人称主语请求句时，为了缓和语气可

能含有的命令口气，可在 will you 后面增加礼貌性词语，如 will you please/kindly···

16. He _______ be praised if he works hard for the people.

A. should B. shall C. ought to D. need to 答案应选择 B 第二、三人称作主语表“意愿”时用 shall 。这时 s

hall 所表示的“意愿”是说话人的“意愿”。

17. Tom wanted to come, but he _____ . A. dare B. doesn’t dare C. daredn’t D. daren’t 答案应选择 D Dare 的否定形式（ daren’t ）可指过去时间。

18. Oh, It’s 7:55 o’clock. The film ________ by the time we reached the theatre because it only lasts 5 minutes.

A. might have finished B. must have finished C. could have finished D. should have finished 答案应选择 B 根据题意可知，到电影院时电影一定已经结束。

19. You________ yourself. A. must have killed B. might have killed C. could have killed D. should have killed 答案应选择 B 这句话的意思是“你差点儿送了命”。

20. He________ the 8 ： 00 train because he didn’t leave home until 8:10.

A. couldn’t have caught B. shouldn’t have caught

C. ought to have caught D. must not have caught

答案应选择 A

couldn’t have done 表示对过去事实否定的猜测，意思为“不可能做某事”； shouldn’t have done 表示过去本不应该做某事，但事实上做了； ought to have done 表示过去本应该做某事，但事实上没做； must have done 表示对过去事实肯定的推测，否定用法应用 couldn’t have done

21. — May I leave the office before 5 o’clock in the afternoon? — No, I’m afraid you ＿＿＿＿＿＿＿ . A. needn’t B. shouldn’t C. mustn‘t D. won’t

答案选 C 。 may 表示“允许”。回答 may 引起的问句，肯定式一般用 Yes, of course. ／ Yes, certainly. ／ Sure.／ Yes, you may. 否定式用 No, you mustn’t 。

22. The traffic light is red, so I ＿＿＿＿＿＿ stop my car.

A. Must B. have to C. can D. mustn’t

答案选 B must 表示说话人的主观愿望，而 have to 多表示客观需要。

23. Let’s clean the classroom, ＿＿＿＿＿＿＿ ? A. won’t you B. shall we C. do we D. will not you

答案 B Let’s do sth . 表示“建议做某事”，含听话一方在内，故用 shall we ；如果用 Let us do sth. 结构，则用 will you? 表示请求对方允许。

24. Mr. Bush is on time for everything. How ＿＿＿ it be that he was late for the opening ceremony? A. can B. should C. may D. must

答案 A

can 表示“可能性”，通常用于否定句或疑问句中，且有时还带有“惊奇、不相信”等感情色彩

25. —— Must I take a bus? —— No, you ＿＿＿＿ . You can walk from here. A. must not B. don’t C. don’t have to D. had better not to

答案 C. 回答 must 引起的问句，否定回答用 needn’t 或 don’t ha

ve to

26. I ＿＿＿＿＿＿ often go fishing when I lived in the countryside. A. should B. would C. could D. might

答案 B. would 在此表示过去的习惯、习性、倾向等，意为 " 常 ......", 通常与 often, sometimes, for hours 等表示时间的短语连用。

27. — Will you stay for lunch? —Sorry,________ . My brother is coming to see me. A.I mustn’t B.I can’t C.I needn’t D.I won’t 答案 B mustn’t 不允许、禁止 can’t 客观上不能办到 needn’t 不需要 won’t 不会，不愿意

28. It’s nearly seven o’clock. Jack _______ be here at any moment.

A. must B. need C. should D. can 答案 C nearly 暗示“时间不早了”， Jack“ 按理应当 (should)随时 (at any moment)” 都有可能到达这里。 must 语气过强； can 一般不用于肯定推测； need 意义不通

29. — Is John coming by train?

—He should, but he _______ not. He likes driving his car.

A. must B. can C. need D. may

答案 D 由“他自己喜欢开车”这一习惯推断，“他可能不会 (may not) 坐火车来”。 can not“ 不可能”，语气太肯定

30. — When can I come for the photos? I need them tomorrow afternoon.

—They _______ be ready by 12:00.

A. can           B. should            C. might            D. need

答案 B

should 表示按理应当，大概。 can 一般不用于肯定推测；用 might 语气太不肯定，顾客可能走掉。

31. He seldom listens to others. He ＿＿＿＿＿ answer for what he has done.

A. shall B. will C. can D. would

答案 A. shall 用于第二、三人称的肯定句或否定句，表示说话人的意愿，有“命令、警告、威胁、强制、允诺、决心”之意。

32. —— Shall I tell John about it?

—— No, you ＿＿＿＿ . I know his telephone number. A. needn’t B. wouldn’t C. mustn’t D. shouldn’t

答案 A. needn’t 表示“不必要”； mustn’t 表示“禁止”； wouldn’t 表示“拒绝”。

33. Tom ＿＿＿＿＿＿＿ show his exam results to his parents. A. dare not B. dared C. dare to D. dares not to 答案 A 情态动词 dare 的过去式为 dared ，常用于否定句、疑问句及条件句中，没有人称和数的变化，否定式是在 dare 后接 not ，再接动词原形。 dare 作为实义动词时，有人称和数的变化，构成否定句时，前要加助动词，后接带 to 或不带 to 的动词不定式

34. I don’t think he ＿＿＿＿＿＿＿ a new bike. 选项有问题A. need to buy B. needs buy C. need D. need buy

答案 D

need 作为情态动词，一般用于否定句、疑问句及条件句中，后接动词原形。表示“现在不必干某事” , 用 need not do sth. ；表示“过去不必干某事”，用 need not have done 。 need 作为实义动词 , 与其它动词用法相同，用于否定句或疑问句要加助动词。

35. —Look at these tracks. It _ ＿＿＿ be a wolf. —It needn't be. It  ＿＿＿ be a fox. A. must ； could              B. may ； might C. need ； must               D. could ； need 答案 A 第一空的答案要根据答语来判断。“ needn't'‘ 的出现表明第一空为” must“ 。后一空表猜测，可以用 could.

36. —— Could I use your telephone? —— Yes, of course you ＿＿＿＿＿ . A. could B. will C. can D. might

答案 C Could I... ？问句表示委婉的请求，若允许对方，应用 ca

n 来作答，而不用 could 。

37. —— Don’t forget to bring my new books tomorrow afternoon. —— No, I ＿＿＿＿＿＿＿ . A. don’t B. can’t C. won’t D. couldn’t

答案 C will 在此表示“应诺”

38. I was really anxious about you. You ＿＿＿ home without a word. A. mustn’t leave B. shouldn’t have left C. couldn’t have left D. needn’t leave

答案 B

shouldn’t have done 表示“过去本来不应该做某事而事实上已经做了”。

39. You ＿＿＿＿＿＿＿ go to the party if you don’t finish your homework first. A. won’t B. don’t C. oughtn’t D. shan’t

答案 D

shall 用于第二、三人称的肯定句或否定句，表示说话人的意愿，有“命令、警告、威胁、强制、允诺、决心”之意。

40. —— It is rather cold here. Shall we light a fire? —— No, we ＿＿＿＿＿＿ because things are easy to catch fire. A. won’t B. can’t C. mustn’t D. needn’t

答案 C mustn’t 在此表示“禁止”