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,*,*,一、动词分类：四种,二、情态动词特点,1.情态动词不受主语（单复数人称）影响。,2.情态动词+动词原形做谓语。,特例：,ought,to+动词原形,haveto,+动词原形,3.否定式：情态动词+not+动词原形,疑问式：情态动词+主语+动词原形?,4.情态动词的基本要求：,1）有哪些？2）,基本意义和特殊用法。,情态动词讲解课件,1,三、情态动词巧妙记忆,(一)原形和一般过去式,1.cancould,2.maymight,3.shallshould,4.willwould,5.have(has)tohad to,（二）无形式变换的,1.must,2.ought to,三、情态动词巧妙记忆(一)原形和一般过去式,2,（三）既可以做情态动词又可以做实义动词的,dare，need,做题时需要,分类讨论,（四）had better,used to,would rather,（三）既可以做情态动词又可以做实义动词的,3,四、高考情态动词考点一,shall,1）,一，三人称，疑问句，,征求对方意见或请求。,2）,二，三人称，陈述句,命令,警告,允诺,威胁。,3）条约、法律、规章、预言等文件中，表示义务、规定。一二三人称。,四、高考情态动词考点一shall,4,2.must,1）第二人称，翻译成：“偏要，硬要”,2）,表示推测时，只能用于,肯定句。,must be,现在的动作,“肯定是”,must be doing,现在正在进行的动作,“现在肯定正在做”,must have done,过去发生的事情,“过去肯定做了某事”,2.must,5,3.can/could,1）表示推测时，主要用在,否定句或疑问句中,。,cant becouldnt be“肯定不是”,Its so late.Can Tom be reading?,It cant be Mary.She has fallen ill.,can/could not be doing“肯定不是正在做”,can/could not have done“过去不可能做某事”,I saw him just now so he couldnt have gone abroad.,3.can/could,6,2）can/could have done,用于肯定句中,“本来能做”,You could have had a better mark.,3）-Could(Can)you?,-Yes,I can(不用could),-May I use your computer?,-Of course you,can.,2）can/could have done 用于肯定句中,7,4)cannot（helpchoose）but+动词原形,“不得不，只能”,I cannot help but tell her the truth.,cannot help it“控制不住，没有办法”,cannot too “无论怎样也不为过”,I cannot thank you too much,cannot help doing sth 禁不住做某事,5）couldnt+动词原形+比较级（再不过了）,It couldnt be better.,I couldnt agree with you more.,4)cannot（helpchoose）but+动词,8,4.may/might,1)表示推测时，用于陈述句，表示把握不大。,might/may（not）do sth“现在将来可能（没）做某事”,mightmay（not）be doing sth,“现在可能（没）正在做”,might/may have done“过去可能做了某事”。,might/may not have done“过去可能没做某事”。,4.may/might,9,They may come here tomorrow.,He might be doing his homework now.,He might have read about the news in the newspaper.,2)May+主语+动词原形。表示祝愿。,祝你成功？,3）maymight as well do sth=had better do sth“最好”,You may as well stay at home tonight.,They may come here tomorrow.,10,5.mustnt do,表示“不可以，绝对不能做”,dont have to do,表示 “没有必要做”=dont need to do=neednt do,-Must I/he/?,-No,you/he/neednt/dont doesnt have to.(不用mustnt),6.can do,只表示有能力,be able to do,有能力并经过努力做成了某事。=manage to do=succeed in doing,5.mustnt do 表示“不可以，绝对不能做”,11,7.used to do 过去常常做，现在不这样了。,否定式是 usednt to do 或者didnt use to do.,疑问式是 used+主语 to do,或者 did+主语 use to do,8.needdare,1）做情态动词常用在,否定句和疑问句,中,2）need 引起的疑问句，肯定回答用have to do 或must；否定回答用neednt 或者dont have to,Need I/he/?Yes,you/he/must.(不用need),7.used to do 过去常常做，现在不这样了。,12,9.,will/would,1）用于,第二人称,表请求，意志，决心，请求。,would比will更委婉礼貌。,If you,will,help me with my English,I,will,be very happy.,I promised that I,would,do my best.,2）用于,第三人称,表示,习惯性动作或者某种倾向,。,will表现在，would 表过去。,On Sundays,he,would,get up early and go fishing.,9.will/would,13,10.should,表惊异、意外等情绪,常译为,“竟然”。,11.“祈使句附加问句”结构，附加问句常用will you形式。Stand still,will you?,12.ought to（客观看法）比should do（主观看法）语气强烈。都可表示推测（可能性很大）。,ought to 的否定式是ought not to=oughtnt to,疑问式是ought+主语+to do sth,13.If+主语+should,祈使句。,礼貌地提出建议。,If you should see him,please give him my regards.,10.should表惊异、意外等情绪,常译为“竟然”。,14,考点一练习,1.“The interest_ be divided into five parts,according to the agreement made by both sides.”declared the judge.,A.may B.should C.must D.shall,2.-The room is so dirty._we clean it?,-Of course.,A.Will B.Shall C.Would D.Do,考点一练习1.“The interest_ be div,15,3.-What does the sign over there read?,-No person _smoke or carry a lighted cigarette，cigar or pipe in this area,AwillBmayCshall D.must,4.John,look at the time._ you play the piano at such a late hour？,A.Must B.Can C.May D.Need,5.You cant imagine that a well-behaved gentleman _ be so rude to a lady.,might B.need C.should D.would,3.-What does the sign ove,16,考点二：情态动词+have+v-ed,都是与过去行为有关,一）表示对过去发生事情的推测,1.,must have done,2.,might/may have done,3.,might/may not have done,4.,can/could not have done,考点二：情态动词+have+v-ed都是与过去行为有关,17,二）本来，却（没有).,1.could have done,2.ought to should have done,3.ought not to should not have done,4.neednt have done,need have done,5.will have done,情态动词讲解课件,18,情态动词+have+v-ed练习,1.Mr.White _at 8：30 for the meeting，but he didnt show up.,should have arrived,B.should arrive,C.should have had arrived,D.should be arriving,2.Tom took away our teachers cell phone without being permitted.,Really？I cant imagine that he _ have done such a thing.,A.mustB.mayC.canD.should,情态动词+have+v-ed练习1.Mr.White,19,3.I have lost one of my gloves.I_ it somewhere.,must drop,B.must have dropped,C.must be dropping,D.must have been dropped,4.I _have been more than six years old when the accident happened.,A.shouldntB.couldnt,C.mustnt D.neednt,3.I have lost one of my glove,20,5.,We_have proved great adventurers，but we have done the greatest march ever made in the past ten years.,A.needntB.may not,C.shouldntD.mustnt,6.I stayed at a hotel while in New York.,Oh,did you?Youwith Barbara.,A.could have stayed B.could stay,C.would stayD.must have stayed,5.We_have proved great ad,21,7.The weather turned out to be fine yesterday.I_ the trouble to carry my umbrella with me.,A.should have takenB.could have taken,C.neednt have takenD.mustnt have taken,8.He paid