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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,*,*,*,Modal Verbs,Unit 1,情态动词表示说话人的某种,感情或语气，对某一动作,或状态的某种态度。,表示,“,需要、可以、,必须、应当,”,等。,什么是情态动词？,(Modal Verbs),can/could,may/might,must/ have to,shall/should (ought to),will/would,need, dare/dared,9/23/2024,2,情态动词的特点：,1.,情态动词自身都有一定的意义，,但不能表示正在发生或已经发生的,事情，只表示期待或估计某事发生。,2.,情态动词除,ought,和,have,外，后,面必须接不带,to,的不定式。,3.,情态动词没有人称和数的变化,也没有非谓语形式。,9/23/2024,3,1,.,can,的主要用法是：,A.,表能力,eg,. The girl,can,dance very well.,be able to,通过努力做成某事,He was able to reach Mount,Qomolangma,in 2000.,B.,表示说话者的推测,事物的可能性,:(,否、疑）,eg,.,Can,the news be true?,C.,在口语中, can,可以表示请求或允许,：,eg,.,Can,I sit here?,1.,can,和,could,9/23/2024,4,2,.,could,的主要用法是：,A. could,是,can,的过去式,表示与过去 有关的能力和推测,:,We all knew that the young man,couldnt,be a doctor.,B. could,可以代替,can,表示请求,但语气较,can,客气、委婉,:,could,提问，答语用,can,-,Could,I borrow your pen?,-Yes, you,can,.,9/23/2024,5,may,常用来表示：,1.,在正式文体中表示请求、允许（,比,can,正式）,：,:,eg,.,May,I come in ?,You,may,go now.,2.,表示说话人的猜测,: “,也许” “可能”,:,通常只用于肯定句和否定句中。,The guest,may,arrive this afternoon.,-Can he attend the meeting?,-Yes, he_. I am,not sure,.,2.,may,和,might,may,9/23/2024,6,3.,表示祝愿,位于句首,eg,.,May,you succeed!,May,you have a good journey!,4. may as well=had better do,(,最好做某事）,You,d better,take notes carefully.,You,may as well,take notes carefully.,9/23/2024,7,3.,will,和,would,will,是助动词,还,是情态动词？,will,用于构成将来时是助动词。,eg,. I,will,tell you something important.,我要告诉你一件重要的事情。,情态动词：,1.,表意愿或意志,I,will,never do it again.,If you,will,marry me, whatever I have is yours, and mines is yours.,9/23/2024,8,2,.,提出 请求或建议,在疑问句中用于第二人称。,eg,: If you want help,let me know,will,you?,Will,you type this, please?,祈使句问句与答语一般用,will,Open the door,will,you?,- Please come to my party.,- Yes, I,will,3.,表习惯或必然结果,Fish,will,die without water.,I,will,go to see my former classmates on weekends.,9/23/2024,9,would & used to (,过去常常，习惯于）,would,现在有可能做，也有可能不做,used to,现在一定没有做,There,used to,be a big tree.,I,would,go to the library when I was free.,I _ to cry when I was a child.,used to,9/23/2024,10,4.,shall,和,should,shall,用法,1.,shall,表征求意见，用于一三人称 疑问句中,Shall,we go by train, Mom?,Shall,he attend the meeting?,2.,用于二 三人称 的陈述句中，表威胁警告命令允诺等语气,You,shall,get a present when I came back.,You,shall,be punished if you break the rules.,9/23/2024,11,should,用法,应该,=ought to,You,should,study hard.,2.,表万一，多位于句首。,Should,he come, I would let you know.,3. “,居然,”,，“竟然,”,表说话人意料之外。,针对现在,- + V,原,针对过去,-,should,have,done,To my surprise, he,should,be a thief.,He,should,have lied to me yesterday.,9/23/2024,12,5.,must,的主要用法,1.,必须。,must,表主观,“,必须,”,have to,表客观,“,不得不,”,I,must,go home this Saturday.,Ive got a cold, so I have to see a doctor.,-,Must,I stay here?,-Yes, you,must./,No, you,neednt.,/you,dont have to.,mustnt,表禁止，不准，一定不要。,You mustnt play with fire.,You mustnt take drugs.,9/23/2024,13,2.,表“偏要”“偏偏”，违背说话人意愿。,Must,you talk in class?,-How much do you earn?,-Ill tell you if you,must,know it.,3.,一定，肯定,He,must,be crazy.,He,must,have stayed up last night.,4.,表推测的反应，反义疑问句中不能出现,must,的形式，反义形式取决于句中时态,9/23/2024,14,1.He must be my English teacher,2. He must have finished his homework,3. It must have rained yesterday,isnt he?,hasnt he?,didnt it?,9/23/2024,15,表示推测,情态动词的重要用法,肯定的推测,可能的推测,否定的推测,疑问的推测,must,对将来,对现在,对过去,情态动词,may, might,cant,couldnt,can, could,+ V.,+ V,.,+ have done,常见,must be + be doing,+ V. + V. + have done,+ be doing,可以用,not,表示“可能不”,+V. + V. + have done,+ be doing,+ V. + V. + have done,+ be doing,9/23/2024,16,Practice :,表示推测,情态动词的重要用法,1. You must be,Mr,Smith-I was told to expect,you here.,2. He must have known what we wanted.,3. We may have read the same report.,4. He cant have slept through all that noise.,5. Theres someone outside-who can it be?,6. What can they be doing?,7. These pills might help to cure your disease.,8. You could be right, I suppose.,9/23/2024,17,1. I dont know where she is. She _ be in,Wuhan.,2. At this moment, our teacher _,our exam papers.,这时,我们老师想必在批改试卷。,3. The road is wet. It _ last night.,(rain),4. Your mother _ for you.,你妈妈一定一直在找你。,5. Mike _ 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。,may,must,be,marking,must have rained,must,have,been,looking,Practice 2: Fill in the blanks.,cant have found,9/23/2024,18,need & dare (dared),情态动词 ：,need/dare do,sth,need/dare not do,sth,实意动词：,need/dare to do,sth,dont/doesnt/didnt dare to do,sth,（无单三形式）,9/23/2024,19,1.Could you lend me your book?,Certainly I can.,2.Might I ask you a question?,Yes, you may.,3.Would you do me a,favour,?,Of course, I will.,4.But would you like to do it for me?,Yes, I would like/love to.,9/23/2024,20,5.-Need I type this letter?,-Yes , you must./Yes , you have to.,(No, you neednt.),6.Must we do it now?,Yes, you must./Yes, you have to.,(No, you neednt.,No,you,dont have to.,No, you dont need to.),9/23/2024,21,1.Being afraid of making mistakes ,he _ answer his teachers question,A. doesnt dare,B. doesnt dare to,C. darent to D. not dare to,2.Having failed the exam, the little boy _go home and face his mom.,A. dares not to B. dares not,C. dare not to D. dare not,9/23/2024,22,情态动词,+have done,should/ought to have done,shouldnt have done,must have done,cant/couldnt have done,could have done,need have done,neednt have done,(,针对过去）,9/23/2024,23,1 Children under 12 years of age in that,country _ be under adult,supervision when in a public library.,(2004,上海）,A. must B. may,C. can D. need,直击高考,9/23/2024,24,2,Some aspects of a pilots job_ be,boring, and pilots often _ work at inconvenient hours.,（,2006,湖南）,A. can,；,have to,B. may,；,can,C. have to; may,D. ought to; must,9/23/2024,25,3The weather turned out to be fine,yesterday. I _ the trouble to carry,my umbrella with me. (2006,江西）,A should have taken,B could have taken,C neednt have taken,D mustnt have taken,9/23/2024,26,4 Hows your tour around the North,Lake? Is it beautiful?,It _ be, but it is now heavily,polluted.,（,2007,全国,I,）,A. will B. would,C. should D. must,9/23/2024,27,5,I told your friend how to get to the hotel, but perhaps I,have driven her there.,（,2007,陕西）,A. could B. must,C. might D. should,9/23/2024,28,7. (10,湖南,23) You _ buy a gift, but,you can if you want to.,A. must B. mustnt,C. have to D. dont have to,8. (10,江西,23) I have told you the truth.,_ I keep repeating it?,A. Must B. Can C. May D. Will,D,A,9/23/2024,29,9., Its the office! So you,_,know,eating is not allowed here., Oh, sorry. (2009湖南卷),A. must B. will C. may,D. need,10,. What do you mean, there are only,ten tickets? There,_,be twelve.,(2009 全国卷I),A. should,B. would,C. will,D. shall,A,A,9/23/2024,30,11,. I cant leave. She told me that I,_,stay here until she comes back.,(2009 全国卷II),A.,can B. must C. will D. may,12.,He must be helping the old man to,water the flowers,_,?,(2009,陕西卷,),A,.,is he,B,.,isnt he,C,.,must he,D,.,mustnt he,B,B,9/23/2024,31,13. - Will you go skating with me this winter,vacation?,- It _ . (2002,上海,),A. all depended B. all depends,C. is all depended D. is all depending,解析,:,答案,B,。,It all depends,是,“,不确定,”,、,“,看情况,”,的意思。,B,9/23/2024,32,根据汉语完成句子。,A: _(,我可以跟朋友,去,) to the harvest festival?,B: Yes, you may.,A: If I want to be a doctor, _,_ (,我应该学理科吗,)?,B: I think so.,May I go with friends,should I study,science,9/23/2024,33,3. I dont know where she is, she _,_ (,可能在武汉,).,4. At this moment, our teacher,_ (,想必在批改,) our,exam papers.,5. The road is wet. It _,(,肯定下雨了,) last night.,6. Your mother _,_ (,一定一直在找你,).,may,must be marking,must have rained,must have been looking,be in,Wuhan,for you,9/23/2024,34,7. Philip _,_(,可能在车,祸中受了重伤,).,8. -Linda has gone to work, but her bicycle,is still here.,-She _ (,可能上班,),by bus.,9. Mike _ (,一定还没有找回,),his car, for he came to work by bus this,morning.,may (might) have been hurt,may (might) have gone,cant have found,seriously in the car accident,9/23/2024,35,Thank you.,9/23/2024,36,
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