情态动词讲解周贤东ppt课件市公开课金奖市赛课一等奖课件.pptx

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.否认式：情态动词+not+动词原形,疑问式：情态动词+主语+动词原形?,4.情态动词基本要求：,1）有哪些？2）,基本意义和特殊使用办法。,第1页,第1页,三、情态动词巧妙记忆,(一)原形和普通过去式,1.cancould,2.maymight,3.shallshould,4.willwould,5.have(has)tohad to,（二）无形式变换,1.must,2.ought to,第2页,第2页,（三）既能够做情态动词又能够做实义动词,dare，need,做题时需要,分类讨论,（四）had better,used to,would rather,第3页,第3页,四、高考情态动词考点,shall,1）,一，三人称，疑问句，,征求对方意见或请求。,2）,二，三人称，陈说句,命令,警告,允诺,威胁。,3）公约、法律、规章、预言等文献中，表示义务、要求。一二三人称。,第4页,第4页,2.must,1）第二人称，翻译成：“偏要，硬要”,2）,表示推测时，只能用于,必定句。,must be,现在动作,“必定是”,must be doing,现在正在进行动作,“现在必定正在做”,must have done,过去发生事情,“过去必定做了某事”,第5页,第5页,3.can/could,1）表示推测时，主要用在,否认句或疑问句中,。,cant becouldnt be“必定不是”,Its so late.Can Tom be reading?,It cant be Mary.She has fallen ill.,can/could not be doing“必定不是正在做”,can/could not have done“过去不也许做某事”,I saw him just now so he couldnt have gone abroad.,第6页,第6页,2）can/could have done,用于必定句中,“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.,第7页,第7页,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 “无论如何也不为过”,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（再但是了）,It couldnt be better.,I couldnt agree with you more.,第8页,第8页,4.may/might,1)表示推测时，用于陈说句，表示把握不大。,might/may（not）do sth“现在未来也许（没）做某事”,mightmay（not）be doing sth,“现在也许（没）正在做”,might/may have done“过去也许做了某事”。,might/may not have done“过去也许没做某事”。,第9页,第9页,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.,第10页,第10页,5.mustnt do,表示“不能够，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,有能力并通过努力做成了某事。=manage to do=succeed in doing,第11页,第11页,7.used to do 过去经常做，现在不这样了。,否认式是 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）做情态动词惯用在,否认句和疑问句,中,2）need 引起疑问句，必定回答用have to do 或must；否认回答用neednt 或者dont have to,Need I/he/?Yes,you/he/must.(不用need),第12页,第12页,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.,第13页,第13页,10.should表惊异、意外等情绪,常译为“居然”。,11.“祈使句附加问句”结构，附加问句惯用will you形式。Stand still,will you?,12.ought to（客观见解）比should do（主观见解）语调强烈。都可表示推测（也许性很大）。,ought to 否认式是ought not to=oughtnt to,疑问式是ought+主语+to do sth,13.If+主语+should,祈使句。,礼貌地提出提议。,If you should see him,please give him my regards.,第14页,第14页,