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1、情态动词,Modal Verbs,情态动词,情态动词是中学英语学习中的一个重点和难点，也是高考的重点考察内容之一。 根据对历年来试题的分析,高考的热点依次是: 1.)推测和可能性； 2.)情态动词+have done； 3.)虚拟语气； 4.)shall, should, can 和must 表特定语气.,1.情态动词主要有:can, could, may, might, must, ought to, shall, should, will, would, need, dare，had better, etc.,Some of us can use the computer now, but
2、 we couldnt last year. It will be sunny in the daytime, but it could rain later on this evening.-Can I go now? -Yes, you can. Could you wait a few days for the money?Can this news be true? How can you be so foolish?,表示“能力”,表示“客观可能性”,表示“请求和允许”,表示“请求”,口语中代替can,使语气更委婉,主要用于疑问句,答语用can.-Could I use your b
3、ike tomorrow? Yes,_. No, _.,表示“惊异,怀疑,不相信的态度(主要用于否定句,疑问句和感叹句中)”,you can,Im afraid,1. can和could,Yes, we can.,Can we pass our college entrance examination?,Yes, we can.,May I watch TV after supper? Yes,_./ No, _. Might I use your telephone? May I go home now? It may be true. She may come tomorrow. He m
4、ight have some fever. May you succeed! May you have many more days as happy as this one!,you may,You mustnt,允许,许可,禁止,阻止,Might比May的语气更委婉,表示可能性的推测,译为“大概,可能”用might时显得更加不肯定,用于祈使句表示祝愿,2. May 和Might,A computer _ think for itself; it must be told what to do. A. cant B. couldnt C. may not D. might not,A,may
5、 _ can_,表主观“可能”,表客观“可能”,Cannot_ may not_,不可能,可能不,3. may 和can,We should be strict with ourselves. You should keep your promise. They should have arrived by two oclock. I should advise you not to do that. You are mistaken, I should say. Ask Tom to ring me up if you should see him. Should I be free tom
6、orrow, Ill come. If things should change suddenly, please let me know.Why should you be so late today?,表劝告和建议应该,表推测,“可能,应该”,用于第一人称,表示说话人的一种谦逊,客气,委婉,用于If从句中表示可能性很小的事情,译为“万一”,“Why/ How+should”表示说话人对某事不能理解.,4 should.,5.shall与should -Excuse me, but I want to use your computer to type a report. -You _ ha
7、ve my computer if you dont take care of it. A. shant B. might not C. neednt D. shouldnt,A,Shall 可表“警告、威胁、许诺、决心”等 Why should he think that? Should 表“劝告、建议”， 译为“应当”；有时也表“预测”、“可能”或表示说话人的惊奇、愤怒、失望等感情。,What shall we do next? Shall we begin our lessons? Shall the driver wait? Shall he come in? Come in, ple
8、ase. When shall my father be able to leave hospital? You shall have the book when I finished it. He shall be punished. You shall be punished if you insist on doing it this way.,用于第一,三人称,表征求对方意见或请示.,用于第二,三人称陈述句中表命令,警告,允诺或威胁,6.表对过去的推测: 情态动词+have+down,对过去肯定推测: 对过去否定推测: 对过去的可能推测:,must have donecouldnt h
9、ave done might have done,He must be reading,_? What he said cant be true,_? He must have gone over the article, _? It must have rained last night,_?,7.表猜测语气的反意疑问句的构成,isnt he,is it,hasnt he,didnt it,1).You must be tired, _? 2).You must go home right now, _? 3). You must have seen the film, _? 4). He
10、must have met her yesterday, _?,arent you,neednt you,havent you,didnt you,典型错误,He mustnt be in the classroom, for I saw him on the playground just now. ( ),cant,2. You might leave the bag in the hall. ( ),might have left,3. You must have seen the film last week, havet you?( ),didnt you,4. Obama must
11、 have been to Japan, didnt he? ( ),hasnt he,情态动词的虚拟用法,I _ my examination easily but I made too many stupid mistakes. If we had taken the other road, we _earlier.You the flowers, for its raining now.You so careless.,could have passed,might have arrived,neednt have watered,ought not to have been,实 战 演
12、 练(practice),1.04 I_ pay Tracy a visit ,but Im not sure whether I will have time this Sunday. A should B.might C.would D.could,2.04-I dont mind telling you what I know. -You_.Im not ask you for it . A.mustnt B.may not C. can,t D.neednt,3.04-Mum,Ive been studying English since oclock._I go out and pl
13、ay with Tom for a while. -No ,Im afraid not.Besides ,its raining outside Now. A.Cant B.Wouldnt C .May not D.Wont,4.04-who is the girl standing over there ? -Well,if you_know ,her name is Mable. A.May B. can C. Must D.shall,5.04 You _be tired -youve only been working for an hour. A must not B.wont C.
14、cant D.may not,6.04Mr White _at 8:30 for the meeting , but he didnt show up . A should have arrived B.should arrived C.should have had arrived D.should be arriving,7.04 I often see lights in that empty house . Do you think I _report it to the police?A .should B. may C. will D.can,8.05 I have lost one of my gloves.I_it somewhere . A.must dropped B.must have dropped C.must be dropping D.must have been dropping,
