发布时间 : 星期二 文章GCT英语更新完毕开始阅读c0271c1a59eef8c75fbfb34f
1．You needn’t come so early. 2. ---- Need I finish the work today? ---- Yes, you must. / No, you needn’t.
3) dare和 need作实义动词用时， 有人称、时态和数的变化。在肯定句中，dare后面常接带to的不定式。在疑问句和否
定句中，dare后面可接带to或不带to的不定式。而need后面只能接带to的不定式。 1. I dare to swim across this river. 2. He doesn’t dare (to) answer.
3. He needs to finish his homework today. 五、 shall, should
1) shall 用于第一人称，征求对方的意见。 What shall we do this evening?
2) shall 用于第二、三人称，表示说话人给对方的命令、警告、允诺或威胁。 1. You shall fail if you don’t work hard.(警告) 2. He shall have the book when I finish it.(允诺) 3. He shall be punished.(威胁) 六、 will, would
1) 表示请求、建议等，would更委婉。 Will / Would you pass me the ball, please?
2) 表示意志、愿望和决心。 1. I will never do that again.
2. They asked him if he would go abroad.
3) would表示过去反复发生的动作或某种倾向。would表示过去习惯时比used to正式，且没有“现已无此习惯”的含义 。
1. During the vacation, he would visit me every other day. 2. The wound would not heal. 4) 表示估计和猜想。
It would be about ten o’clock when she left home. 七、 should, ought to
1) should, ought to表示“应该”，ought to表示义务或责任，比should语气重。 1. I should help her because she is in trouble. 2. You ought to take care of the baby.
2) 表示劝告、建议和命令。should, ought to可通用，但在疑问句中常用should。 1. You should / ought to go to class right away. 2. Should I open the window? 3) 表示推测
should , ought to (客观推测), must(主观推测)。
__________________________________________________________________________ can, could, may, might, must 皆可表示推测，其用法如下： 1）情态动词+动词原形。
表示对现在或将来的情况的推测，此时动词通常为系动词。
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_________________________________________________________________________ 2）情态动词+动词现在进行时。
表示对现在或将来正在进行的情况进行推测。
____________________________________________________________________________ 3）情态动词+动词完成时。 表示对过去情况的推测。
____________________________________________________________________________ ____________________________________________________________________________ 4）情态动词+动词的现在完成进行时。 表示对过去正在发生事情的推测。
____________________________________________________________________________ 5）推测的否定形式，疑问形式用can’t, couldn’t表示。
____________________________________________________________________________ ____________________________________________________________________________ 注意：could, might表示推测时不表示时态，其推测的程度不如can. 练习：
1. --- _____ I go out to play now, Mum?
--- No, you _____. You should do your homework first.
A. Must; mustn’t B. Must; wouldn’t C. May; needn’t D. May; had better not 2. _____ you like to have a walk with us this evening? A. Did B. Would C. Should D. Can
3. You _____ be careful when you cross here --- the traffic lights aren’t working. A. could B. might C. ought to D. may
4. We were all waiting for you; you _____ for the seaside by yourself without leaving a message.
A. mustn’t leave B. needn’t leave C. shouldn’t have left D. couldn’t have left 5. It _____ be she that told him about it; it _____ be you, because only you and I know it.
A. mustn’t; must B. couldn’t; must C. mustn’t; might D. couldn’t; might 6. A hardworking man _____ become a great scientist, but a great scientist _____ be a hardworking man.
A. can’t; can B. may not; can C. can’t; must D. may not; must
7. You _____ go right now if you want, but I think you _____, because we have enough time. A. must; may not B. must; can’t C. may; needn’t D. may; mustn’t 8. --- Why do you ask me to do the difficult work?
--- Because you _____ do such a thing and nobody else is fit for it. A. would B. can C. should D. may
9. You _____ be tired; you have been working for so long a time, but he _____ be tired; he has just
begun to work.
A. may not; must B. must; may not C. can’t; must D. must; can’t
10. It’s said that there are plenty of hotels in that town. There _____ be any difficulty for you to
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find somewhere to stay.
A. wouldn’t B. mustn’t C. shouldn’t D. needn’t 11. Don’t believe him. What he said ______ be true.
A. mustn’t B. needn’t C. shouldn’t D. may not 12. --- Must I take a bus?
--- No, you _____. You can walk there.
A. must not B. may not C. don’t have to D. had better not to 13. --- Do you think he will help me?
--- As far as I know, he is the last one to help others. He _____ be prepared to give you a hand,
though.
A. can B. must C. might D. should
14. You _____ return the dictionary now. You can keep it till next week if you like. A. can’t B. mustn’t C. don’t need D. don’t have to
15. The thief _____ in from the kitchen window as all the other windows and doors were closed.
A. may climb B. must have climbed C. could climb D. should have climbed 16. --- We want someone to design the new art museum for us. --- ______ the young fellow have a try?
A. May B. Shall C. Will D. Need 17. --- Must we do it now? --- No, you _______.
A. won’t B. needn’t C. can’t D. don’t 18. --- I don’t know why he is late. --- Nor do I. He _____ an accident.
A. could have had B. should have had C. might have had D. must have had 19. I got up early, but I _____ so because I had no work to do that morning.
A. mustn’t have done B. shouldn’t have done C. needn’t have done D. can’t have done
20. --- ______ he use your bike？ --- Certainly. Here is the key.
A. Shall B. Must C. Will D. Does 21. You __yesterday if you were really serious about the job.
A. ought to come B. ought to be coming C. ought to have come D. ought have come
22. My wallet is nowhere to be found. I ______when I was on the bus.
A. must drop it B. should have dropped it C. must have dropped it D. had dropped it 23. John ____be in the classroom because I saw him in the library just now.
A. mustn’t B. isn’t able to C. can’t D. may not 24. _______my guest have forgotten my address?
A might B May C could D would 25. As it turned out to be a small house party, we __so formally.
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A. needn’t dress up B. did not have dressed up C did not need dress up D needn’t have dressed up 26. If you don’t like to swim. You __stay at home.
A. should as well B may as well C can as well D would as well 27. Go straight into the cave and find out what’s in there, _______?
A. don’t you B do you C will you D can you 28. I want to go to the dentist, but you ________with me.
A. need not to go B do not need go C need not go D need go not 29 No one ____that to his face. A dare to say B dare says C dares saying D dare say
30. A car stopped on the highway. It ____out of gas.
A may not run B may have run c must run D ought to run 31. I’m sorry I couldn’t get in touch with him before he left. I _____him earlier.
A had a telephone B have phoned c should have phoned D should be phoned 32. Since there aren’t answering their telephone, they ____.
A must have left B should have left C need have left D can have left 第九讲.非限定性动词
在句子中，不能做谓语，而是担任其他语法功能的动词，叫做非限制动词。包括 动词不定式，分词和动名词。 动词不定式
一.在句子中作不同成分，位置不同 1． 作主语 2． 作表语 3． 作宾语
4． 作宾语补足语 5． 作定语 6. 作状语
二.疑问词 +动词不定式
____________________________________________________________________________ 三.动词不定式复合结构
It is necessary for us to learn from each other.
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_________________________________________________________四.动词不定式时态的形式
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