一、情态动词的介绍1、情态动词也可称为情态助动词(ModalAuxiliaries),因为它和基本助动词(be,do,have)都属于助动词类。2、情态动词和其他动词连用，可表示说话人的语气。3、情态动词可表达建议、要求、可能和意愿等。4、常用的情态动词有：can,could,may,might,must,shall,should,will,would其他的还有haveto,oughtto,need,dare等。5、在口语中，否定情态动词的缩写法：cannot/cannot-cantcouldnot-couldntmaynot-mayntmightnot-mightntmustnotmustntdarenot-darenshallnot-shantshouldnot-shouldntwillnotwontwouldnotwouldntneednot-needntoughtnottooughtnto6、情态动词没有人称和数的变化。(haveto-hasto除外)7、情态动词的时态变化：现在式can-过去式could现在式may-过去式might现在式shall-过去式should现在式will-过去式would现在式haveto-过去式hadto现在式dare-过去式dared现在式need-过去式neededmust和ought都是没有时态的二、情态动词的句型1、情态动词的疑问句：只要将情态动词移到主语(Subject)的前面，句尾加上问号。Shecanwork.Canshework?Hewouldbeworking.Wouldhebeworking?Theyshouldhaveworked.Shouldtheyhaveworked?2、情态动词的否定句：在情态动词的后面加上not。Shecanwork.Shecannotwork.Hewouldbeworking.Hewouldnotbeworking.Theyshouldhaveworked.3、情态动词的否定疑问句：Theyshouldnothaveworked.将否定情态动词移到主语的前面，或只把情态动词移到主语的前面。Canshenotwork?或Cantshework?Wouldhenotbeworking?或Wouldnthebeworking?Shouldtheynothaveworked?或Shouldnttheyhaveworked4、情态动词的反问句：Shecanwork.Shecanwork,cantshe?Hewouldbeworking.Hewouldbeworking,wouldnthe?1. 三、情态动词的基本用法(划横线的意项有例句，没划横线的意项例句参见课本89页)can能力，许可，推测may许可，推测，祝愿Mayyoubehappy.2. must必须(mustnt禁止，不允许)，推测，一定要.坚持要Ifyoumustgo,atleastwaittilltherainstops.shall用在问句中表示征求对方意见或请求指示主要用于第一、第三人称，用于的第二、第三人称，表示说话人的意图、允诺、警告、命令、决心等用于官方或正式的文件中,Heshallhaveabicycleforhisbirthday.Allpaymentsshallbepaidbytheendofthemonth.3. should应该，预测，吃惊的语气Theyshouldarriveatnoon.Itissimplyamiraclethatriceshouldgrowinsuchaplace.4. will意志，意愿，询问对方的意愿或提出请求，（主语的强烈意志，主张）无论如何总要表示没有时间限制的倾向性动作或习惯Thisdoorwonshut.Iwillmarryyouwhateverhappens.Oilwillfloatonwater.油不溶于水（油浮在水的面上）。5. would过去的意志，意愿，询问对方的意愿或提出请求比will更委婉，过去常常Shewouldlosethekey!6. oughtto应该，和should的用法差不多，非常可能Ifsheiscompletelywell,sheoughttobebackatschooltoday.1. -ShallItellJohnaboutit?-No,you.Ivetoldhimalready.2. needntB.wouldntC.mustntD.shouldnt-Therewerealreadyfivepeopleinthecar,buttheymanagedtotakemeaswell.-Itacomfortablejourney.A.cantbeB. shouldntbeC.mustnthavebeenD.couldnthavebeen3.-Whydidntyoucometoseeme?-I,butIwastoobusyyesterday.A.liketoB.shouldliketoC.wouldliketohaveD.amgoingto4.Youcantimaginethataweilhavedgentlemanbesorudetoalady.A.mightB.needC.shouldD.would5. Therewasplentyoftime;shemustnthavehurriedB.neednthavehurriedmaynothavehurriedD.wouldnthavehurriednot.Helikestakingtrains.-IsJohncomingbyair?-Heshould,butA.mustB.canC.needD.may7.-itbeLiPingwhobroketheglass?-No.ItbeWangHaiwhodidit.A.Could;mayB.Can;canC.May;mustD.Can;must8. Whentheoldmanwasalive,hesitforhoursatthedoor.A.wouldB.couldC.mustD.might9.Jack,youplaywiththeknife;youhurtyourself.A.wont;cantB.mustnt;may10.IvedecidedtotakethejobandIC.shouldnchangemymind.t;musD.cant;shouldA.mustntB.cantC.wontD.maynot11.Sheintothethickforestaloneonsuchadarknight.A.daresnotgoB.daresnottogoC.darenottogoD.doesntdaretogo12.Myparentsneverremembermytelephonenumber,andtheyalwayslookitup.A.mustB.canC.shouldD.haveto-WhereisJack?IcantfindhimanywhereHehishomeworkupstairs.A.mighthavedoneB.musthavedoneC.mightbedoingD.mustdoHeyoumorehelp,eventhoughhewasverybusy.A.mighthavegivenB.mightgiveC.mustgiveD.maygiveWhateveryouwant,youhaveitonconditionthatyougetthebestresult.saidtheboss.A.wouldB.shallC.oughttoD.couldTom,youaresolazy!Thisworkhoursago.A.shouldfinishB.shouldhavebeenfinishedC.musthavefinishedD.mighthavefinishedWhencanIcomeforthephotos?Ineedthemtomorrowafternoon.13.14.15.16.17.18.19.20.21.22.23.24.25.26.Theybereadyby12:00.A.canB.shouldIsuchamistakeagain.A.willnevermakeC. canneverdoHebegantowritetwohoursago.HeA.mustB.oughtLookingatmydeterminedface,thebigboyA.daresnotB.darednotC. mightD.needB. shallnevermakeD. needneverdo_havefinishedthearticlenow.C. wouldD.hadtopickupthefight.C.doesntdareD.daresnottoYouknowthatyouweredriving100kmanhour,dontyou?Noofficer,I.Thiscardoesntdomorethan80.A.maynothavebeenB.couldnthavebeenC.mustnthavebeenD.shouldnthavebeenIthinkhecouldhavejoinedus,butheA.doesntB.didC.didntD.couldntWhyitrainnow?Igototheconcertat7.Whatapity!A.can,mightnotB.should,needntC.must,cantD.need,mustntHewascaughtintherainlastnight.Thathiscold.A.canbringaboutB.oughttobringaboutC.shouldhavebroughtaboutD.mayhavebroughtaboutDidyouvisitthefamousmuseum?No,we,butwespenttoomuchtimeshopping.27. A.couldhavevisitedB.musthavevisitedC.canthavevisitedD.shouldnthavevisitedYoumustphoneuseveryweek.A.mustB.havetoYes,IC.willD.shouldDontthrowthebottlesaway.Theyinthefuture.28. A.mayneedB.areneededC.canbeneedingD.mightbeneededEnglishisalanguagethatmanypeoplearoundtheworldnotspeakperfectlybut_atleastunderstand.29. A.may,canB.would,mightC.wi