1、中考英语情态动词用法总结1、比较need和dare 这两词既可做实义动词用，又可做情态动词用。作为情态动词，两者都只能用于疑问句，否定句和条件句。 need 作实义动词时后面的不定式必须带to，而dare作实义动词用时, 后面的to 时常可以被省略。1) 实义动词： need（需要, 要求） need + n. / to do sth 2) 情态动词： need，只用原形need后加do，否定形式为need not。Need you go yet？ Yes, I must. / No, I neednt. 3) need 的被动含义：need, want, require, worth（形容词
2、）后面接doing也可以表示被动：need doing = need to be done2、带to的情态动词 带to 的情态动词有四个：ought to, have to, used to, be to, 如加上have got to ,(=must), be able to，为六个。它们的疑问，否定形式应予以注意： Do they have to pay their bill before the end of the month She didnt use to play tennis before she was fourteen. You ought not to have told
3、 her all about it. Ought he to see a heart specialist at once. ought to 本身作为情态动词使用。其他的词作为实义动词使用，变疑问，否定时，须有do 等助动词协助。典型例题 Tom ought not to _ me your secret, but he meant no harm. A.have toldB.tellC.be tellingD. having told 答案A。由于后句为过去时，告诉秘密的动作又发生在其前因，此地应用过去完成时，但它在情态动词 ought to 后，所以用have。3、情态动词的回答方式 问
4、句肯定回答否定回答Need you Yes, I must.No,I needntMust you /dont have to.典型例题1）-Could I borrow your dictionary -Yes, of course, you_. A. mightB. will C. can D. should 答案C.could表示委婉的语气，并不为时态。答语中of course，表示肯定的语气，允许某人做某事时，用can和 may来表达，不能用could或might。复习： will 与you连用，用来提出要求或下命令。should与you 连用，用来提出劝告。2）-Shall I te
5、ll John about it -No, you _. Ive told him already. A. needntB. wouldntC. mustntD. shouldnt 答案A。neednt 不必，不用。 wouldnt 将不, 不会的。 mustnt 禁止、不能。 shouldnt不应该。本题为不需要，不必的意思，应用neednt。3）-Dont forget to come to my birthday party tomorrow. -_. A. I dont B.I wont C. I cantD. I havent 答案B.will既可当作情态动词，表请求、建议、也可作为
6、实义动词表 意愿、意志、决心，本题表示决心，选B。4、will和would 注意： 1）would like； Would like to do = want to 想要，为固定搭配。 Would you like to go with me 2）Will you Would you like 表示肯定含义的请求劝说时， 疑问句中一般用some, 而不是any。 Would you like some cake？ 3）否定结构中用will，一般不用would, wont you是一种委婉语气。 Wont you sit down？5、would rather表示宁愿 would rather
7、do would rather not do would rather than 宁愿而不愿。还有would sooner, had rather, had sooner都表示 宁愿、宁可的意思。 If I have a choice, I had sooner not continue my studies at this school. I would rather stay here than go home. = I would stay here rather than go home.典型例题-Shall we go skating or stay at home -Which _
8、 do A. do you ratherB. would you rather C. will you rather D. should you rather答案B。本题考查情态动词rather的用法，would rather +do sth 意为宁愿，本题为疑问句，would 提前，所以选B。6、had better表示最好 had better 相当于一个助动词，它只有一种形式，它后面要跟动词原形。 had better do sth had better not do sth It is pretty cold. Youd better put on my coat. Shed bett
9、er not play with the dog. had better have done sth表示与事实相反的结果，意为 本来最好。 You had better have come earlier.7、情态动词+ have +过去分词 1) may(might) have + done sth, can (could) have + done sth表示过去，推测过去时间里可能发生的事情。 Philip may (might) have been hurt seriously in the car accident. Philip can (could) have been hurt
10、seriously in the car accident.2)must have +done sth，对过去时间里可能发生的事情的推测，语气较强，具有肯定，谅必的意思。 -Linda has gone to work, but her bicycle is still here. -She must have gone by bus.3) ought to have done sth, should have done sth本应该做某事，而事实上并没有做。否定句表示 不该做某事而做了。 You ought to (should) have been more careful in this
11、 experiment. He ought not to have thrown the old clothes away.（事实上已扔了。） ought to 在语气上比should 要强。4) neednt have done sth 本没必要做某事 I dressed very warmly for the trip, but Ineednt have done so. The weather was hot.5) would like to have done sth 本打算做某事 I would like to have read the article, but I was ver
12、y busy then. 8、 should 和ought to should 和ought to 都为应该的意思，可用于各种人称。 -Ought he to go -Yes. I think he ought to. 表示要求，命令时，语气由 should（应该）、had better最好）、must（必须）渐强。9、表示推测的用法 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。 I dont know where she is, she may be in Wuhan. 2）情
13、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。 At this moment, our teacher must be correcting our exam papers. 这时，我们老师想必在批改试卷。3）情态动词+动词完成时。表示对过去情况的推测。 We would have finished this work by the end of next December. 明年十二月底前我们很可能已完成这项工作了。 The road is wet. It must have rained last night. 地是湿的，昨天晚上一定下雨了。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。 Your mother must have been looking for you. 你妈妈一定一直在找你。5）推测的否定形式，疑问形式用cant, couldnt表示。 Mike cant have found his car, for he came to work by bus this morning. 迈克一定还没有找回他的车，因为早上他是坐公共汽车来上班的。 注意：could, might表示推测时不表示时态，其推测的程度不如can, may。
