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CONTENTS一、情态动词的那些事儿二、情态动词的那些一般用法三、情态动词的那些推测用法四、情态动词的那些特殊用法情态动词的那些事儿PARTONE情态动词的那些词儿maymightcancouldwillwouldshallshouldmusthavetoneed…情态动词的那些特点CaiXukuncansingsongswell.FanChengchengcansingsongswelltoo.ButDongYanleican’tsingsongswell.3.有助动词的作用1.不能单独作谓语，必须与动词原形连用2.没有人称和数的变化情态动词里的那些一般用法PARTTWO①may/might②can/could③will/would④shall/should⑤must/haveto/needMayIgototheBall?Yes,youmay.Yes,youcan.No,youmustn’t.No,youcan’t.maymight意义：请求获得对方的允许，“可以”might(委婉语气)否定--mustn’t/can’t肯定--may/canmusthavetoneed1.否定mustn’t,“禁止”2.否定回答用needn’tNo,youneedn’t.No,youdon’thaveto.MustIdothehousework?Yes,youmust.musthavetoneed3.must与haveto的区别ImustgototheBall.ButIhavetofinishthehousework,beforeIgototheBall.cancould1.表具备某种能力：能，能够；could(过去的能力)Cinderellacoulddancewellinthepast.Cinderellacandancewellnow.cancould2.表请求和允许：“可以”=may；could(委婉语气)回答：肯定--can否定--can’tCouldIdancewithyou?Yes,youcan.知识要点总结情态动词本意may,mightcan,couldmust允许能力，允许必须否定含义不能不可以不可以禁止回答may/canmustn’t/can’tcancan’tmustneedn’t1.--MusthesingthesonginEnglish?--No,he_____.A.needn’tB.can’tC.mustn’tPracticemakesperfect2.--Mum,_____Ivisitthesciencemuseumtomorrow?--I’mafraidyou_____.ItisclosedonMonday.A.must;mustn’tB.may;can’tC.should;can’tPracticemakesperfect3.--Mum,_____Iplayfootballthisafternoon?--Sure,butyou_____finishyourhomeworkfirst.A.may,couldB.can,mustC.can,mustn’tD.may,can’tPracticemakesperfectwillwould1.用于第二人称的疑问句中，表“请求、建议”等;would(委婉)2.用于表示意志，意愿或决心，意为“会，愿意”。will指现在，而would指过去。Willyoumarryme?Yes,Iwill.Iwillloveyouforever.shallshould1.征求对方意见，用于第一，第三人称疑问句中shallShallweholdourweddingthisSunday?Ok.shallshould意为：应该。表达义务，职责（说话人的观点）shouldAshuman,weshouldbekindtoothers.1.--Manypeopleplaywithmobilephonesalldayinsteadofreadingbooks.--That’stoobad.Everyone_______beabooklover.ReadingismoreenjoyableA.mayB.shouldC.wouldPracticemakesperfectLet’stakeabreak!情态动词那些推测用法PARTTHEREmay(might)can(could)mustcan/couldmay/mightmust用于肯定句“可能”might(可能性更小)0％50％100％用于疑问句，否定句“不可能，可能吗”could(可能性较小；可用于肯定句，疑问句，否定句)用在肯定句中“一定”GuessinggameWhoisthis?It__________beFanBingbing.It__________beGuojingming.It__________beWangBaoqiang.It’sahe.It’snotverytall.HeplayedasTangReninthemovieDetectiveChinatown.mustmay/mightcan’t1.Thegirlintheclassroom______beSarah.Shehasgonetothelibrary.A.mayB.mustC.can’tD.needn’tPracticemakesperfect2．--Whosebookisthis?--Iamnotsure.It_____beMary’s.A.shallB.mustC.mightD.canPracticemakesperfect3.--Listen.Ithinkit_____beMr.Whitesingingintheoffice.--No.It_____behim.HeleftforLondonjustnow.A.must,mustn’tB.may,mustn’tC.must,can’tD.can,canPracticemakesperfect4.--He______beintheclassroom,Ithink.--No,he____beintheclassroom.Isawhimgohomeaminuteago.A.can；maynotB.must；maynotC.may；mustn’tD.may；can'tPracticemakesperfect情态动词的那些特殊用法PARTFOURusedtodobe/getusedtodoinghadbetterdo情态动词的那些特殊用法意义usedtodobe/getusedtodoing过去常常做某事习惯于做某事Obamausedtoeathamburger,butnowheisusedtoeatingspicybar.情态动词的那些特殊用法hadbetterhadbetterdo最好做……hadbetternotdo最好不要做……You’dbetterworkhardinmiddleschool.表达“建议”和“忠告”，hadbetterdo“为好”，建议某人“最好不……”，要用hadbetternotdo。1.Mygrandfather_____liveinthecountryside，butnowhe______livinginthecity.A.usedto;usedtoB.gotusedto;getsusedtoC.usedto;getsusedtoPracticemakesperfect2.--You'dbettertoomuchtimechattingonline．--OK．Iwon't．A.don'tspendB.nottospendC.tonotspendD.notspendPracticemakesperfect1.--Idon’tcarewhatpeoplethink?--Well,you_____.You’renotaloneinthisworld.A.canB.mayC.shouldD.will真题演练2.--MayItakethedogwithme,sir?--_____.Petsarenotallowedtoenterthehall.A.Yes,youmay.B.No,youmustn’t.C.Yes,youcan.D.No,youneedn’t.真题演练3.--WillJimflytoTaiwanforaholiday?--He_____try.Infact,itdependsonhowmuchthejourneycosts.A.mayB.hastoC.needD.must真题演练4.Whenyouaretravelling,bringamapbecauseit_____helpyouA.can’tB.mustn’tC.usedtoD.may真题演练5.Agoodfriendissomeoneyou_____shareyourpleasureandpainwith.A.canB.mustC.needD.should真题演练Summary