英语 Unit 1 Festivals around the world period Learning about languageGrammar情态动词 新人教版必修3 .ppt
情态动词modalverdsandtheirmeaningsSomeofuscanusethecomputernow,butwecouldnttenyearsago.(ability)Can/CouldIborrowyourbikeforamoment?(permission)Ithoughtthestorycouldnotbetrue.(possibility)Youmaygonow.(permission)HesaidthatImightusehistelephone.(permission)modalverdsandtheirmeaningsTheworkmustbefinishedassoonaspossible.(necessity)Youmustntsmokeinpublicplaces.(necessity)WhereshallIwaitforyou?(request)Youshouldkeepyourpromise.(request)Iwilltellyouallaboutit.(promise)Willyougivehimamessagewhenyouseehim?(request)Hewontgowithus.(prediction)情态动词否定式和缩略式小结情态动词否定式缩略形式情态动词否定式缩略形式cancannot/can notcantshallshall notshantcouldcould notcouldntshouldshould notshouldnt maymay notmayntwillwill notwontmightmight notmightntwouldwould notwouldntmustmust notmustntneedneed notneedntdaredare notdarentought toought not tooughtnt tocan/couldwhatsthemeaningofcan/couldCanIuseyourbook?&CouldIuseyourbook?“可以”（Permission)可以，允许(could更委婉)Excuseme,isthisseattaken?CanIsithere?Yes,youcan.推测can:只用于否定和疑问句Shecantbeourteacher.could：肯定、否定、疑问均可couldnt比cant更不确定You_betiredyouveonlybeenworkingforanhour.A.mustnotB.wontC.cantD.maynotCmay,might可以，允许(比can/could更正式)MayI?推测cantcouldntmaynotmightnotcouldmaymight区别：maybe，maybeThese shoes _ Jims,I think.A.maybe B.may beC.may are D.may ismaybe可能(副词，不能做谓语）maybe可能是（动词，能做谓语）Cshould，oughttoshould“应该”（义务、责任或劝告）Booksandfriendsshouldbefewbutgood.oughtto语气更强Everybodyoughttodoatleasttwothingseachdaythathehatestodo.must,havetomust必须：主动haveto不得不：被动接受You must practice English everyday.I have to practice English everyday.You should practice English everyday.Youd better practice English everyday.mustnot(mustnt)禁止MustIdo?Yes,youmust.No,youdonthaveto./No,youneednt.Mustwefinishthejobbeforedark?No.You_leavesomepartsofittomorrow.A.mustB.mustntC.needD.mayDwill,would“愿意”will（现在）would（过去）would征求意见（语气委婉）shall(shant)规章、法令规章、法令所有人称所有人称命令，警告，命令，警告，二，三二，三征求意见征求意见一一含义含义人称人称Ithasbeenannouncedthatcandidates_remainintheirseatsuntilallthepapershavebeencollected.A.canB.will C.mayD.shallD情态动词表示猜测肯定：mustshouldcouldmaymight否定：cantshouldntcouldntmaynotmightnotJohnny,you_playwiththeknife,you_hurtyourself.A.wont,cantB.mustnt,mayC.shouldnt,mustD.cant,shouldntBIve taken someone elses green sweater by mistake.It _ Marys.He always wears green.(05广东广东)A.has to beB.will beC.mustnt beD.could beD能力 请求/允许 必要性 推测cancouldmaymightmustshallshould练习1.-CouldIborrowyourdictionary?-Yes,ofcourseyou_.A.mightB.willC.canD.should2.Tom,you_leaveallyourclothesonthefloorlikethisnexttime.A.wouldntB.mustntC.needntD.maynot3.-CouldIborrowyourdictionary?-Yes,ofcourseyou_.A.mightB.willC.canD.should4.-WhycanyourteacherknowsomuchaboutLondon?-He_havebeentherebefore.A.mayB.mustC.oughttoD.should5.-Alice,letsgotothesupermarketandbuysomefood.-Sorry,Mike_cometoseemethisafternoonsoIdbetterstayathomeincasehecomes.A.canB.mayC.mustD.will6.-Hi,Johnson,anyideawhereSusanis?-Itsclasstime,soshe_intheclassroomnow.A.canbeB.musthavebeenC.mighthavebeenD.shouldbe7.-CanIpaythebillbycheque?-Sorry,sir.Butitisthemanagementrulesofourschoolthatpaymentbemadeincash.A.shallB.needC.willD.can8.Hepaidforaseat,whenhe_haveenteredfree.A.couldB.wouldC.mustD.need9.Sinceyouhavemadesuchgoodpreparations,there_beanyproblemaboutpassingthecomingexamA.mustnt B.shantC.shouldntD.neednt10.Thelessondrawnfromthecoalmineaccidentsisthatsafetymeasuresaresoimportantthatwe_takethemtooseriously.A.cantB.shouldC.mustntD.shall11.-MightIwatchTVaftersupper?-Yes,you_.A.mayB.mustC.mightD.can12.-Willyoustayforlunch?-Sorry,_.Mybrotheriscomingtoseeme.A.ImustntB.IcantC.IneedntD.Iwont13.-MayIpickaflowerinthegarden?-_.A.No,youneedntB.Not,please.C.No,youmustntD.No,youwont14.Putonmoreclothes.You_befeelingcoldwithonlyashirton.A.canB.couldC.mustD.would15.MustIdrivetohishouseandpickupthechildren?No,_.A.youshouldntB.youmightnotC.youneedntD.youmustntHomeworkI翻译下列句子（使用情态动词）你能帮我一个忙吗？_他去广州了，今天不可能在家。_我们应当遵守承诺。_他可能去学校了。_IICreateashortdialogueusingmodalverbsaccordingtothefollowingsitation.Inalibrary.Askthelibrarianifhecanhelptofindabookrelatingtosomespecifictopics,whethertheycanberenewedornot,andhowtodoifthebooksarelost.Wouldyoulike.?CouldIhave.?MightIsuggest.?MayIsee.?Youshouldtry.?Couldwelookat.?Canyousee.?Wemighttake.?IIIRecitethesentenceswithmodalverbsinthereadingpassage.If we cant do as we would,we must do as we can.
