情态动词二.ppt

1、Grammar,情态动词,1) can的主要用法是： A. _： eg. The girl can dance very well.,表示能力,C. _: eg. Can I sit here? Can I leave now?,表请求或许可,B. _： eg. Can the news be true? You cant be serious.,表示可能,注意：表示可能性，肯定句一般不用can , can 用在疑问句和否定句中。 Peter may come with us tonight, but he isnt sure yet.,解答情态动词类的题目时， 一定要细细领会情景特征， 情景

2、中没有任何废话， 不要放过任何细节。,There is no light on - they _ be at home. A. cant B. mustnt C. neednt D. shouldnt,2. My MP4 player isnt in my bag. Where _ I have put it? A. can B. must C. should D. would,2) could的主要用法是： eg. We all knew that the young man couldnt be a doctor.,could 是can的过去式, 表示过去的能力和推测,could可代替ca

3、n表示请求, 语气委婉,Could you lend me your dictionary? Could I use your bike?,eg. They cant /couldnt have gone out because the light is still on.,cant /couldnt have done 过否猜,1. I _ have been more than six years old when the accident happened. shouldnt B. couldnt C. mustnt D. neednt,may 常用来表示： - _ I stop her

4、e, sir? - No. Go on to the next paragraph, please. A. Will B. May C. Would D. Ought,表示请求、允许;比can正式:,You may go now.,eg. -I believe the man is from England. But I may be wrong.,表示猜测, 推测(没把握的),Peter _ come here tonight, but he isnt very sure yet. A. must B. may C. can D. will,eg. May you succeed! May

5、you have a good journey!,表示祝愿;语气较正式:,might 的用法有: She said that he might take her bike. 她说他可以拿她的自行车去用。 -Is this Toms bike? I am not sure, but it _ be. A. might B. will C. must D. can,A.一般表示过去可能，也可用现在， 比may更弱,might + have done 表示对过去发生 事情的没把握的判断。,cant/ couldnt have done 不可能做过 might have done 可能做过,-Wher

6、e is my dictionary? I remember I put it here yesterday. - You _ it in the wrong place. must put B. should have put C. might put D. might have put,- John is abscent (缺席）today. - He _ have caught a cold, but I am not sure. A. can B. might C. must D. should,eg: You must get up early.,表示必须,must 的主要用法：,e

7、g: We must all die. You get the first prize, and you must be very happy now.,表推测，判断，有把握的,偏要，硬要,1. - May I smoke here? - If you must, choose a seat in the smoking section. 2. John, look at the time. Must you play the piano at such a late hour?,must have done 表示对过去事情 肯定的判断 must do/ be 对现在事情的判断,1. Tom

8、graduated from college at a very young age. - Oh, he _ have been a very smart boy then. could B. should C. might D. must,2. She looks very happy. She _ have passed the exam. - I guess so. Its not difficult after all. A. should B. could C. must D. might,可能性从大到小: must. can could may might,Will,If you

9、want help, let me know, will you? Will you type this, please?,疑问句中用于第二人称，提出请求,Close the door, _,will you ?,祈使句的反意疑问句常用will 提问,Would you help us, please? 请您帮助我们，好吗？ Id go there with you. 我要和你一块到那儿去。 He said he would make this computer work again.,（表请求）,would比will客气委婉,（表意愿）,（表决心）,He would sit there fo

10、r hours, doing nothing at all.,（表习惯，倾向）,shall和should：,（表 “决心”，情态动词）,Shall we go by train, Mom? 妈妈，我们乘火车去好吗？ I shall go at once. 我要立即去。,用于征求意见和表 “决心”,You shall go with me,Shall 表示说话人的允诺、警告、命令等语气,He shall be punished.,should 的用法 :,You should have done your homework better.你本该把作业做的更好些。 He should have c

11、ome earlier. 他应该来得更早些。,should +have done 表示过去本该做 某事，而没做,-Where is Emma? -I cant say for sure where she is, but she_ be out shopping. A. can B. should C. must D. may,D,The room is in a terrible mess; it _ cleaned. A. cant have been B. couldnt be C. may have been D. would be,A,-Jane has just come back from China and she looks happy. - She _ her trip very much. must enjoy B. must have enjoyed C.may enjoy D should have enjoyed,B,You _ be tired - youve only been working for an hour. A. must not B. wont C. cant D. may not,C,When can I come for the photos? I need them tomorrow