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英语情态动词学习课件.ppt

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1、Module 5 Grammar The Revision of Modal Verbs,Wednesday, June 19, 2013,Correct the sentences.,1. After a two-hour walk, Li Hua must exhausted.2. In crowded places like airports and railway stations, you must to take care of your luggage.3. You dont need return the book now. You can keep it next week

2、if you like.,In crowded places like airports and railway stations, you must take care of your luggage.,After a two-hour walk, Li Hua must be exhausted.,You neednt / dont need to return the book now. You can keep it next week if you like.,Module Verbs,共同特征是:1. 必须与其他动词(需用原形)一起构成谓语 部分。2. 情态动词无人称和数的变化,

3、后面跟动词原 形。 3. 否定式构成是在情态动词后面加 “not”。,情态助动词: can, could; may, might; must; shall, should, ought to; will, would; used to; need; dare,Conclusion,Find out the meanings of “can” in the following sentences. 1. The parrot can speak three languages. “能,会” 2. You can take the car, if you want. 3. Who can it b

4、e at this time that is knocking?“可能” 4. Can you give me a lift to the station?“能不能” 5. Shanghai can be very cold in March.“有时会”,“可以”,The usage of “can”,表示能力 “能,会” 2. 表示允许 “可以” 3. 表示推测 “可能” 4. (用于疑问句中, 表请求帮助) “能不能” 5. “有时会”,can 和be able to The fire spread through the hotel very quickly but everyone _

5、 get out.A. had to B. would C. could D. was able to,D,was/were able to do表示经过努力而做成了某事, 相当于managed to do/succeeded in doing。但 不用could。,I _ thank you too much for all your help to my son while we were away from home.(2012陕西)A. wont B. cant C. can D. willcan not + v. + too/over + adj./ adv.cannot + v.

6、+ adj./ adv. + enough无论怎么也不过分;越越好;You cant be careful enough when crossing the street.,B,1. She may be still waiting for us. 2. May I come in? 3. May you have a happy holiday.,may,might: 语气更委婉,may / might,Liza _ well not want to go on the tripshe hates travelling. A. will B. can C. must D. may,Concl

7、usion: may/might well “很可能” 拓展:You are here, so you _ as well give me a hand A. can B. should C. need D. may,D,may/ might as well “不妨;最好;只好;还是的好”,D,Guess the meanings of “must” in the following sentences.,1. Must we hand in our exercise books now?“必须、应该” 2. He is absent today; he must be ill.“一定” 3.

8、 If you must go, at least wait until the storm is over. 4.Johnny, you mustnt play with the knife; you may hurt yourself.“禁止、不准许、不可以”,“偏偏、偏要、硬要、非要”,The usage of “must”,1. 表示 “必须、应该” 2. 表示肯定的猜测,但只用于肯定句。 “一定” 3. “偏偏、偏要、硬要、非要”(表示与说话人愿望相反或不耐烦)If you must , 4. mustnt 表示“禁止、不准许、不可以”,Conclusion: must 表示主观;h

9、ave to 表示客观需求 “不得不做 ”,must / have to 1. Because it is Sunday, we _ _(不必上学).2. You _ buy a gift, but you can if you want to.(2010 湖南)A. must B. mustnt C. have to D. dont have to3. _ I go back before lunch?No, I dont think you _.A. Need; must B. Do; need to C. Must; have to D. May; ought to,dont have

10、to go to school,D,C,shall,He shall be punished if he disobeys. 2. If you work well, you shall have higher wages. 3. According to the law, half of his money shall be given to the city of Venice. 4.Nothing shall stop us from carrying out the plan. 5. Shall I get you a cup of coffee?,表示警告,表示允诺,表示法律规定,表

11、示决心,请求或征求对方意见”,should/ ought to 1. You should apologize to him. “应该、应当” 2. The photos should be ready by 12:00.“应该会、想必会” 3. Im glad that your story should have won the first prize. 4. Why should you think that way?“究竟、到底” 5. If she should know the truth, she would be greatly depressed.用于虚拟语气中,竟然,sho

12、uld: 1.(表示义务、责任、劝告、建议) “应该、应当”; 2.(表推测或可能性)应该会、想必会; 3.(表惊讶、遗憾)竟然、居然; 4.(与疑问词why, who, how等连用,表示意外、纳闷、惊讶等)究竟、到底; 5. (用于表示命令、建议、请求的动词后面的that从句中,should 可省略)应该、必须;,will,1. If you will listen to me, Ill give you some advice. 2. Will you help me to put these books in order? 3. Oil will float on water. 4.

13、Jenny will often sit there for hours reading. 5. Whats the matter with the door? It wont lock.,表示意愿、决心或愿望,用于叙述真理,用于疑问句中,表示请求(用于 第二人称),(表示现在的习惯性、倾向性、 必然性)惯于、老是、总是,(表示功能)能、行,would 1.would 表示过去经常做的事或过去经常发生的事。 “总是;老是;经常” When we worked in the same office, _(我们经常一起喝咖啡) . 2.客观地、委婉地提出请求、愿望、看法等 “愿意”_ (你能告诉我

14、如何去那儿吗) ? 3.虚拟语气的主句中If he were in town, _(他会帮助我们) .,he would help me,Would you like to tell me how to get there,we would often have coffee together,used to do则可以接表示动作或状态的动词(现在不做了)I used to drive to work but now I cycle. He used to be a worker. He didnt use to / usednt to be a worker (变为否定句)Used he /

15、 Did he use to be a worker? (变为一般疑问句)He used to be a worker, usednt he?/didnt he?/usent he? (变为附加疑问句), need/dare,1. I wonder how he _ that to the teacher.A. dare to say B. dare saying C. not dare say D. dared say 2. John _ his father about his failure in the exam.A. dares not tell B. dares not telli

16、ng C. dare not tell D. dares not to tell,D,C,need与dare need和dare既可用作动词,也可用作实义动词。 need作情态动词时,多用于否定句和疑问句。 用作情态动词 1. Need I come? (Do I need to come?) Yes, you must. 2. You neednt telephone him now. 用作实义动词 1. We _(不必告诉) them the news. 2. The table needs _(paint).,dont need to tell,painting / to be pain

17、ted,dare作情态动词,多用于否定句、疑问句和条件句。dare 有过去式dared 用作情态动词 1. She dare not go out alone at night. 2. How dare you say Im unfair? 3. Dare he cross the river? No, he darent 用作实义动词 1. We should dare to give our own opinion. 2. He _(不敢出去) alone at night.,did not dare (to) go out,含有情态动词的一般疑问句的答语 Could I use your

18、 bike? Yes, you _. Might I ask you a question? Surely, you _. Would you do me a favor? Of course, I _. Would you like to do it for me? Yes, _. Must/Need we hand in our composition now? Yes, you _. No, you _.,can,may,will,Id like/ love to,neednt / dont have to,must,Exercises,1. We _(昨晚本应学习), but we w

19、ent to the concert instead.2.If it hadnt rained yesterday, _(我们就去散步了).3. The door was locked. She _(一定不在家里).4. 5.,should have studied last night,we would have gone out for a walk,Exercises,couldnt have been at home,情态动词+have+done”,should/ought to have done过去本来应该(而实际上并没有做) must + have +done对过去事情的肯定猜测

20、否定式是 cant/ couldnt have done 3. may/ might have done 表示对过去情况的推测 “过去可能做” 4. could have done 表示“过去本来能够(可以)做” 实际上过去没能做 5. need not have done表示过去没有必要做某事,而实际上已经做了 6. would have done 表示与过去事实相反之假设的结果,常与if 条件句连用。,should have done表示过去本应该做而未做。 Eg. You should have been five minutes ago.I cant think why he should have said that; it wasnt my fault.,can/could + have +done, can/could + have +done在否定、疑问句中表示对过去的可能性猜测 “过去可能” could + have +done在肯定句中表示 “过去本来可能做而未做”,不能用can have done代替., The door was locked. She couldnt have been at home. You could have been more careful.,虚拟语气用于条件状语从句中,

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