情态动词复习课件

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,情态动词,1,英语专项复习,情态动词,概念：,情态动词是表示情态意义的动词，他表示说话人的语气和情态，它不能单独作谓语，必须与实义动词一起构成谓语，情态动词没有人称和数的变化，过去式通常表示更客气、更委婉,。,I,can speak,English .He,can speak,English.,They,can speak,English, too.,Can,you help me? /,Could,you help me?,2,必须掌握的情态动词：,can could,may might,will would,must have to,need had better sho,uld,3,考点一：情态动词基本含义,can ( could ),能,，,may (might),可以，可能,will (would),将，会，愿意,must,必须,have to,不得不 有人称和数的变化,4,need,需要,should,应该,had better,最好,5,can/could,1.,能，能够。,Can,只有一般现在时和一般过去时（,could,），其后直接跟动词原形，用于一切人称和单复数。其否定式是,cannot,，常缩写为,cant,。,I can sing English songs.,Can you sing English songs?,I cant sing English songs.,6,2.,表示请求和允许。,-Can I go now?,-Yes, you can. /No, you cant.,3.,表示客观可能性（客观原因形成的能力）,This hall can hold 500 people at least.,7,4.,表示推测（惊讶、怀疑、不相信的态度），用于疑问句，否定句和感叹句中。,Can this be true?,This cant be done by him.,How can this be true?,8,may/might,1.,作“可以”讲，表示许可。,e.g. You may leave now.,2.May I ?,表示请求许可，否定回答时要用,mustnt,，表示“不可以”、“禁止”之意。,e.g.,-May I drive your new car?,-Yes, you may. / No, you,mustnt,.,3.,作“可能”“或许”讲，表示推测、用于谈论可能性。,e.g. He may be very busy now.,注意：当,might,在表示推测时，不表示时态，只是,might,说明的可能性比,may,还要小一些。,e.g. He might be our new classmates.,9,4. may,用于祈使句中表示祝愿,。,e.g. May you succeed!,5.might,比,may,的语气更加委婉、客气。,Might I use your pen for a while?,10,must,1. must,必须,否定式为,must not=mustnt,则表示”不可以“”禁止“,e.g. You must come on time.,You mustnt play on the road.,2.,回答,must,引出的问句时，如果是否定的回答，不能用,mustnt,，而,要用,neednt,或,dont have to,.,e.g. Must we hand in our exercise books today?,- Yes, you must./No, you dont have to.,11,3. must be+,表语 表示对现在的情况的推测，作”一定“讲。,e.g. This must be Lucys clothes.,12,I.,表示”必然性“,e.g. Fish will die without water .,II.,表示“意愿”或“意志,”,e.g. We will help him if he asks us for help.,.,询问对方的意愿或提出要求，常与,like, love,连用，主要用于疑问句中。,e.g. Would you like another cup of tea?,Will you go with me?,will/would,13,would(will,的过去式,)+,动词原形表过去将来,.,I promised that I would do my best.,He wouldnt give in unless he changed his mind.,14,1.Shall,在问句中,征求对方意见,，与第一、第三人称连用,e.g. Where shall I wait for you?,Shall I get some chalk for you?,我去给你拿些粉笔来好吗？,2.,陈述句中用于第二、第三人称，意为“必须，应，可能”,They shall succeed.,他们一定会成功。,shall/should,15,3. should,用作情态动词,表示劝告或建议，意为”应该“，,e.g. We should be strict in all our work.,我们应该严格要求我们所有的工作。,16,need,1. need,作情态动词用于一般疑问句和否定句，其肯定回答用,must,否定回答用,neednt.,e.g. - Need I finish the work today?,- Yes, you must./ No, you neednt.,2.,need,用作及物动词，其后的宾语可以是名词、动词不定式、动名词、代词。用法与其它行为动词一样，有人称和数的变化。,e.g. - Does he need to wash his hand?,- Yes, he does./ No, he doesnt.,17,sb,need to do,sth,Sth,need to be done.,sth,need doing,.,I need to look up the word in the dictionary.,My watch needs mending/ to be mended.,18,had better,had better,相当于一个助动词，后跟动词原形。它只有一种形式，没有,has/have better,这种表达。它的否定式是在后面加,not,。,e.g. 1. We had better go now.,2. Wed better not cry.,19,1.-_ you speak Japanese ?(,北京,2008,）,-No, I cant,A. Can B. Must C. May D. Should,2.You _ stop when the traffic light is red.(,山西）,A. can B. may C. must D. need,3.LiLei cant go hiking with us today .Because he_,_take care of his sick mother .(,温州）,A .has to B .may C. mustnt D .need t,A,C,A,Lets do,20,考点二：表猜测语气的情态动词,表猜测性的情态动词有：,may,，,cant,，,must,。,may,表没把握的猜测。,He may/might be a foreigner.,cant,表有把握的否定猜测。,That man cant be our head teacher, because he has gone to Shanghai.,must,表有把握的肯定猜测,He must be hungry, he has worked in the fields all the afternoon.,21,1.The light in the office is off. The teacher _be there now.,（南通）,A. may B. cant C. mustnt D. must,2.His parents bought him a large house . It _be very expensive,（宁夏）,A. must B. can C. mustnt D. cant,B,A,Lets do,22,考点三：情态动词开头的疑问句的答语,句型,肯定回答,否定回答,Can I,Yes, you can .,No, you cant .,May I ,Yes ,you may.,No, you mustnt.,No, you cant.,Must I,Yes, you must.,No, you neednt.,No, you dont have to,Need I,Yes, you must.,No, you neednt,23,1.Must I take the keyboard to the office now ?,-No, you _.You can do it later.,A.mustnt,B . cant C . dont D. neednt,2.May I take this book out of the reading room?,-No, you _. You must read it here.,A. may not B .dont have to C. mustnt D. neednt,D,C,Lets do,24,考点四：易混词的辨析,（,一）,must,与,have to,We _study hard .,We _stay at home because it is raining.,提示：,must,表主观看法，意为“必须”。,have to,表客观需要，意为“不得不”,（二）,maybe,与,may be,_he is right . It_ rainy tomorrow,.,提示：,may,为情态动词后接动词原形。,Maybe,为副词意思为“大概，也许”,must,have to,Maybe,may be,25,考点四：易混词的辨析,（三）,can,与,be able to,I_ speak English now.,My sister _ speak English two years ago.,My brother _ speak English in the future.,提示；,can,只有现在和过去时（,could,）,be able to,可用于任何时态中。表示将来具备的能力 ， 要用,will be able to,（,四）,cant,与,mustnt,cant,表“不可能”。,mustnt,表“禁止，不许”。,can/am able to,could/was able to,will be able to,26,1-How is your friends coming?,-I,m not sure. He _drive here.,A may B. can C. must D. will,2(,2008.,江西,),If the traffic is red ,you _cross the road .It,s very dangerous .,A don,t B. mustn,t,C. needn,t D. wouldn,t,A,B,Lets do,27,3.(,2009.,江西,)-Susan has bought a large house with a swimming pool.,-It _be very expensive, I never even dream about it .,A must B. might C .can,t D. shouldn,t,4.(,2009.,襄樊,）,-Must I get up before six o,clock tomorrow morning, Dad?,-No, you _.Tomorrow is Saturday .You may get up later.,A mustn,t B. can,t,C. need,t D. may not,A,C,28,5.(,2010,江西,）,-How was the youth club last night ,Mark ?,-It was great fun .You _come.,A must B. can C. should D. may,6.,（,2006.,威海,）,He needs _her the truth,the flowers need_.,A. to tell, watered. B tell, to water C. tell, watered D to tell ,watering,C,D,29,7.,（,2008.,上海,）,-Would you like to come to my birthday party?,-Id love to .But I _look after my sister.,A. must B. can C. have to D. need to,8.(,2009.,成都,）,-what would you send to your sister as the Christmas gift?,-I havent decided yet .I_ send her a hand bag.,A. shall B. may C. need D. must,C,B,30,9.(,2009.,天津,）,-shall I tell Bob the news?,-No, you _,Ive told him already.,A. shouldnt B. wouldnt C. mustnt D. neednt,10.(,2007.,武汉,）,wed better _at home .The sun is shining.,A. stay B not stay C. staying D. not staying,D,B,31,虚拟语气,neednt have done,本来不需要做某事却做了（对过去的虚拟）,You neednt buy the coat.,你没有必要买那件大衣。（你还没买）,You neednt have bought the coat.,你没有必要买那件大衣（而你却买了）。,should/ought to have done,本应该做某事却未做,Should not/ought not to have done,本不应该做某事却做了,She should /ought to have finished the task.,must have done,一定做过某事,32,might/may have done,本可以做某事却没有做,They might have taken more food with them.,could have done,本能做某事却没做,She could have passed the examination.,33,情态动词,+be doing,应,/,可能正在做某事,She may be writing a letter.,34,考点总结,1,单词的意思,2,情态动词的答语,3,表猜测的情态动词,may, cant ,must .,4,易混淆的情态动词,can,与,be able to,；,have to,与,must,；,maybe,与,may be,；,cant mustnt,注意,：,need,的用法；,had better,的用法,。,35,1.-Mum ,may I watch TV now ?,-Sure ,but you _help me with my English.,A. can B. may C. must D. could,2.Alice ,please be quiet! The others _hear clearly.,A. cant B. neednt C. shouldnt D. mustnt,Homework,C,A,36,3.-Whos that under the tree ?Is it Jenny ?,-It _be Jenny .Shes ill in the hospital today.,A. cant B. must C. may D mustnt,4.-Must I finish writing the article now ,sir?,-No ,you _.But you must finish it before next class.,A mustnt B. may not,C cant D. neednt,A,D,37,5.(,2009,绍兴,）,-could you please come to the Museum with me this afternoon?,-Sorry, I_.I have to take a piano lesson .,A. couldnt B. mustnt C. cant D. neednt,6.(,2008.,河南,）,-_ I go swimming with Dad, Mom?,-No, you neednt .You can stay at home.,A. May B. Should C. Must D. Would,C,C,38,Thank you,for listening,！,39,