情态动词练习题1 John___ come to see us tonight, but he isn't very sure yet.A. mayB. canC. has toD. must2 They ___ do well in the exam.A. can be able toB. be able toC. can able toD. are able to3 -May I take this book out?-No, you___.A. can'tB. may notC. needn'tD. aren't4 You___ go and see a doctor at once because you're got a fever.A. canB. mustC. dareD. would5 -Can you speak Japanese?-No, I____.A. mustn'tB. can'tC. needn'tD. may not6-He___ be in the classroom, I think.-No, he ___ be in the classroom. I saw him go home a minute ago.A. can; may notB. must; may notC. may; can'tD. may; mustn't7 -Shall I get one more cake for you, Dad?-Thanks, but you___, I've had enough.A. may notB. must notC. can'tD. needn't8 Even the top students in our class can't work out this problem, so it be very difficult.A. mayB. mustC. canD. need9 He isn't at school. I think he ___ be ill.o A. can B. shall C. must D. has to10 ___ I take this one?A. MayB. WillC. AreD. Do11 The children___ play football on the road.A. can'tB. canC. mustn'tD. must12 You ___ be late for school again next time.A. mustn'tB. needn'tC. don't have toD. don't need to13 -Must I do my homework at once?-No, you___.A. needn'tB. mustn'tC. can'tD. may not14 His arm is all right. He___ go and see the doctor.A. has not toB. don't have toC. haven't toD. doesn't have to15 He had to give up the plan, ___ he?A. didB. didn'tC. doesD. doesn't16 They had to walk here, ___ they?A. mustn'tB. didC. didn'tD. hadn't17 He had better stay here, ___ he?A. didn'tB. don'tC. hadn'tD. isn't18 You'd better___late next time.A. not to beB. not beC. won't beD. don't be19 You'd better ___ your hair ___ once a month.A. had; cutB. had; cuttedC. have; cutD. have; cutted20 You___ ask that man over there. Maybe he knows the way.A. had better not toB. had not betterC. had betterD. had better not21 -Shall we go and visit the History Museum next Sunday?A. Here you areB. Sorry, I can'tC. Yes, pleaseD. Let me try22 -Why don't you ask Mike to go with us?-Thanks, ___.A. I willB. I won'tC. leanD. I may23-___ I take the newspaper away?-No, you mustn't. You____read it only here.A. Must; canB. May; canC. Need; mustD. Must; must24 Excuse me. ___ you please pass me that cup?A. DoB. ShouldC. WouldD. Must25 ___ you like to have another try?A. CouldB. WillC. WouldD. Do26 -Would you like to go boating with us?-Yes, ___.A. I'd likeB. I wantC. I'd like toD. I do27 You___ worry about your son. He will get well soon.A. needn'tB. can'tC. mustn'tD. have to28 The poor man needs our help, ___ he?A. needB. needn'tC. doesD. doesn't29 -Must we do our homework first?-No, you___. You may have a rest first.A. mustn'tB. needn'tC. may notD. can't1.ADABB2.CDBCA3.CAA4.DBC5.ABCC6.CABC8.ADB1. —That must be a mistake.—No, it _____ a mistake.A. must not beB. needn’t beC. cannot beD. would not be2. —_____ I water the trees on Tuesday?—No, you needn’t.A. CanB. MustC. MayD. Shall3. He _____ not pay unless he is punished to pay.A. shallB. willC. canD. would4. I _____ such a mistake again.A. shall never makeB. may never makeC. can never doD. need never do5. —_____ I turn on the radio?—You’d better not. It is noisy enough in this room.A. ShallB. MustC. NeedD. Do6. Let’s go to the library this afternoon, _____?A. shall weB. will weC. can weD. should we7. Where are my keys? I _____ lost them.A. ought toB. should haveC. will haveD. must have8. Even if he has time, he _____ shopping in town on Sunday.A. won’t goB. will goC. won’t go toD. doesn’t go9. He _____ finished earlier.A. shall haveB. ought toC. could haveD. must have10. In case I _____, I would try again.A. will failB. would missC. should failD. shall miss11. Since the road is wet this morning, _____ last night.A. it must rainB. it must have rainedC. it must be rainedD. it must have been rained12. He asked me if he _____ open the window.A. shallB. wouldC. willD. should13. Everyone _____ do his best to make the world safe and clean.A. canB. mayC. shouldD. had to14. _____ to have lunch with us today?A. Do you likeB. Would you likeC. Will you likeD. Have you like15. —Will you lend me your book?—Yes, I _____.A. willB. needC. canD. must16. If I had time, _____ see that new movie at the Capital Theater.A. I willB. I mayC. I shallD. I would17. The English of her composition is too good. She can’t _____ it herself.A. have to writeB. have writtenC. writeD. be written18. You _____ the look on his face when he won the lottery.A. would have seenB. can be seeingC. must seeD. may see19. The light is out in her room; she _____ to bed.A. must have goneB. had goneC. must be goingD. must go20. They _____ that far; but they stopped to have a snack on the way.A. might be goneB. needed goC. could have goneD. ought have gone21. He _____ to the farm yesterday.A. need goB. needed goC. has to goD. had to go22. He is so strong that I _____ fight against him.A. dare notB. did dare notC. didn’t dare toD. dare not to23. I couldn’t _____ cry while I was watching the movie “To live”.A. help toB. helpC. help but toD. help but24. They asked Tom to give him a drink, but he _____.A. hadn’tB. wasn’tC. wouldn’tD. could25. As physics is hard enough, I _____ study it.A. am not ableB. couldn’tC. am not able toD. cannot26. You _____ to the meeting this morning if you have something important to do.A. needn’t to comeB. don’t need comeC. don’t need comingD. needn’t come27. _____ you fetch me some hot water?A. CanB. MayC. MustD. Might28. You _____ get down the bus until the bus has stopped.A. can’tB. needn’tC. mustn’tD. don’t29. —Would you come and join us?—I wish I _____. I am busy at the moment.A. canB. couldC. wouldD. should30. You _____ right, but I don’t think you are.A. may beB. could beC. would beD. should be31. She looks so sad. She _____ ill.A. can beB. should beC. must beD. will be32. He _____ away. We don’t see him anywhere around.A. may goB. must goC. can goD. must have gone33. He is much richer than what he _____.A. would beB. must beC. used to beD. could be34. The little kid _____ not touch the dog.A. needB. dareC. oughtD. could35. I want to go to the hospital, but you _____ with me.A. need to not to goB. do not need goC. need not goD. need go not36. When he was old, Mr Smith _____ sit for hours without saying anything.A. wouldB. shouldC. mustD. will37. Mary _____ be in London because I saw her in town just now.A. mustn’tB. isn’t able toC. may notD. cannot38. The door is still closed. He _____ the key.A. must have lostB. must loseC. need have lostD. can lost39. The bus had left, so we _____ walk home.A. have toB. oughtC. had toD. must40. You _____ see her, but I must.A. haven’tB. cannotC. mustn’tD. needn’t答案1—5 CBBAA6—10 ADACC 11—15 BDCBA 16—20 DBAAC 21—25 DADCC 26—30 DACBA 31—35 CDCBC 36—40 ADACD解析：1. cannot表示否定的推测。