情态动词ppt课件省名师优质课赛课获奖课件市赛课百校联赛优质课一等奖课件.ppt

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,*,本资料仅供参考，不能作为科学依据。谢谢。本资料仅供参考，不能作为科学依据。本资料仅供参考，不能作为科学依据。谢谢。本资料仅供参考，不能作为科学依据。,情态动词使用方法归类,1/27,只作情态动词,can/could,may/might,ought to,must,可情态可实义,need,dare,可情态可助动词,shall/should,will/,would,相当于情态动词,have to,used to,2/27,表示推测情态动词,表示“情感、态度、语气”等方面情态动词,情态动词+have done,3/27,（一）表示推测情态动词,对现在或未来情况推测，用情态动词+do/be/be doing；,对过去推测，用情态动词+have done/been；,4/27,表示必定推测情态动词按可能性大小依次为,mustshould/ought tomaymightcould；,否定推测，惯用cant/couldnt，,译为“根本不可能”、“想必不会”，表示推测语气非常必定，,may not/might not,译为“可能不”、“可能不”，表示推测语气不很必定。,5/27,must表示对某人某事猜测,作“准是”,“一定”,普通用于必定句中。,You,must,bethenewteacher.,He,must,bejoking.,6/27,should(not)/ought(not)to表示依据常规或常识推测，表示“某事应该或不应该发生”，语气比must或cant/couldnt稍弱。,e.g.,Hows your tour around the West Lake?Is it beautiful?,It _ be,but it is now heavily polluted.,A.will B.would C.should D.must,【答案】C,7/27,can,could,表示推测时，普通用于疑问句和否定句中；,e.g.,Can,the news be true,?,He,cant,be in the classroom now,for the light is out.,can,用于必定句中表示一个理论上可能性,，并不牵涉是否真会发生；,The road can be blocked,.,could,用于必定句中，语气比can更弱。,8/27,(,4)may(not)/might(not),表示一个不太把握推测，意为“或许，可能”；might语气比may较婉转.,May,表示说话人,猜测,:“可能”“可能”:通常只用于必定句和否定句中。,e.g.-I believe the man is from England.,-But I,may,be wrong.,The guest,may,arrive this afternoon.,9/27,might表示现在可能，其可能性要比may 小,。如：,e.g.She,might,go home tomorrow.,说不定他明天会回家。,10/27,（二）表示“情感、态度、语气”等方面情态动词,1.must表示“情感、态度、语气”主要有以下使用方法,：,(1)表示主观义务和必要，,主要用于必定句和疑问句，意思为“必须，得，要”；,由must引发疑问句，必定回答要用must或have to，否定回答要用neednt或dont have to,意思是“无须”。,Must,Ifinishallassignmentsatatime?,Yes,you,must,.,No,you,neednt,.,11/27,表示“必须”这个意思时，must和haveto稍有区分。must着重说明主观看法，haveto强调客观需要。,must和 haveto,I dont like this TV set.We,must,buy a new one.There was no more bus.They,had to,walk home.,12/27,(2),must否定形式mustnt表示禁止，意思是“不能，不许”。,比如：,(上海春)When I was young,I was told that I _ play with matches,A.wouldnt B.neednt C.mustnt D.darent,【答案】C,13/27,must还能够用来表示责备、埋怨感情色彩，意思为“偏要，硬要、干嘛”。,比如：,He,must,come and worry her with question,just when she was busy cooking the dinner.,14/27,2.should“应该”，表示“责任和义务”。,比如：,You,should,keep your promise.,你应该恪守诺言。,15/27,3.shall,(1)shall用于第一和第三人称，惯用于疑问句中，用来征求对方意见比如：,Shall,we go by train,Mom?,Shall,they wait here or outside?,(2)用于第二和第三人称，表示“命令、威胁、警告、允诺、”等。,比如：,You,shall,fail if you dont work harder.,He,shall,have the book when I finish reading.,16/27,(,3)shall也用于宣告法律、要求要求,。比如：,What does the sign over there read?,“No person _ smoke in this area.”,A.will B.may C.shall D.must,【答案】C,17/27,4.can,(1)can能够用来表示惊异、怀疑、不相信态度，主要用于否定句、疑问句或感叹句中,。,(NMET全国)How _ you say that you really understand the whole story if you have only covered only part of the article?,A.can B.must C.need D.may,【答案】A,(2)can也能够用来表示请求或许可。,Can,I sit here?,18/27,(3),can能够表示普通或永久能力。be able to也可表示能力，但惯用来表示在某件事情中所表现出来能力，尤指克服困难能够完成某事。,比如：,(NMET福建)If it were not for the fact that she _ sing,I would invite her to the party.,A.couldnt B.shouldnt C.cant D.might not,(NMET1997)The fire spread through the hotel very quickly but everyone _ get out.,A.had to B.would C.could D.was able to,【答案】C D,19/27,5,.would,(1)will与would可表示“意愿；意志”。,(NMET北京)John promised his doctor he _ not smoke and he has never smoked ever since.,A.might B.should C.could D.would,【答案】D,20/27,(2),would表示过去倾向性或习惯性动作。used to 也有这一使用方法，但used to即可用来表示过去习惯性动作，也可用来表示过去状态。,比如：,(NMET1996上海)When he was there,he _ go to that coffee shop at the corner after work every day.,A.would B.should C.had better D.might,(NMET安徽)In my opinion,life in the twenty-first century is much easier than _.,A.that used to be B.it is used to,C.it was used to D.it used to be,【答案】A D,21/27,（三）情态动词+have done,must表示对某人某事猜测,;,对过去发生事情作必定判断用must have done,Thereisnobodyhere.They,musthaveall gone,home.,22/27,can和could接动词完成形式。,could have done:表示本可能做某事却没做。(有惋惜、遗憾或委婉批评之意，也能够表示对过去动作推测),e.g.a.You could have done better,but you didnt try your best.,b.This glass iscracked.Someone could have dropped it,cant/couldnt have done:用于否定句时表否定推断，推测必定没做；用于疑问句时意为“莫非真做了吗”，表示怀疑。,e.g.They cant have gone out because the light is still on.,Can he have done such a foolish thing?,cant have done 语气比 couldnt have done 要强一些,23/27,“should+have+过去分词”表示本应该在过去做但没有做,。,should(not)/ought(not)to have done本（不）应该做某事，但却没有做或做了，含有责备或后悔之意,（NMET江苏）Im sorry.I _at you the other day.,Forget it.I was a bit out of control myself.,A.shouldnt shout B.shouldnt have shouted,C.mustnt shout D.mustnt have shouted,【答案】B,24/27,neednt have done本没有必要做某事但却做了。要注意neednt do则表示“没有必要去做某事”，时间上应该是现在或未来。,比如：(NMET福建,)Catherine,I have cleaned the room for you.,Thanks.You _ it.I could manage it myself.,A.neednt do B.neednt have done,C.mustnt do D.shouldnt have done,【答案】B,25/27,would(not)have done原来(不)会发生某事，但却（发生了）或没有发生。,惯用于虚拟条件句或含蓄虚拟条件引导虚拟语气，,表示对过去所发生事情结果假设。,I would have told you all about the boys story,but you didnt ask me.我原来会告诉你这个小男孩故事，不过你没有问我。,Without your help,I wouldnt have achieved so much.没有你帮助，我是不会取得如此大成绩。,26/27,might have done表示“原来可能”，但实际上没有发生事。,比如：,(NMET江西)What a pity!Considering his ability and experience,he _ better.,A.need have done B.must have done,C.can have done D.might have done,【答案】D,27/27,