高教版英语情态动词课件

Language 制作人 南丰职校徐才龙 Modalverbs Modalverbs Whatdoyouknowaboutmodalverbs Howmanymodalverbsdoyouknow What sthedifferenceamongthem CanCouldMayMightMustOughttoShallShouldWillWould CommonModalVerbs P S Todaywejustlearnthreeofthem can may must 1 Modalverbsdonottake s inthethirdperson e g HecansspeakChinese 2 Use not tomakemodalverbsnegative eveninSimplePresentandSimplePast Theymaynotcometotheparty 3 Manymodalverbscannotbeusedinthepasttensesorthefuturetenses e g Shemustedstudyveryhard x Note x Can beableto Can isoneofthemostcommonlyusedmodalverbsinEnglish Itcanbeusedtoexpressabilityoropportunity torequestorofferpermission andtoshowpossibilityorimpossibility e g Icanrideahorse Cantheydance Youcannotspell Askandanswer CanKittyspell Yes shecan Derek Kitty Kitty Can minus Can Can No hecan t subtract Yes shecan Yes shecan add May ismostcommonlyusedtoexpresspossibility Itcanalsobeusedtogiveorrequestpermission e g Shemaybeathome orperhapsatwork possibility Youmayleavethetablewhenyoufinishyourdinner givepermission MayIuseyourbathroom requestpermission May perhaps Using may inpresent futureandpast Must ismostcommonlyusedtoexpresscertainty Itcanalsobeusedtoexpressnecessityorstrongrecommendation Mustnot usestoprohibitactions butitisverysevere e g Studentsmustpassatexttostudyatthisschool necessity Youmusttakesomemedicineforthatcold strongrecommendation Jenny youmustnotplayinthestreet prohibition Must haveto Using must inpresent futureandpast Whatdothesignsmean Doyouknow Youmustnotcycle Youmustbecareful Youmustturnleft Youmustnotenter Youmustpaytenyuan Youmustkeepsilent Youmustnotturnright Youmustnotsmoke 情态动词 情态动词不能单独作谓语动词 后接其它动词原形做谓语 没有人称和数的变化 表示能够或不能做某事用can或can t Abirdcanfly Fishcan tlivewithoutwater 2 告诉人们必须或禁止做某事用must或mustn t Youmusthandinyourhomeworkatonce Youmustn ttalkloudlyinpublic 3 表示请求或允许做某事may或can MayIcomein CanIopenthedoor Notes 1 can和beableto的区别 beableto有人称数和时态的变化 Icancometomorrow Hewasabletohelptheoldlady Iwillbeabletocometomorrow 2 在回答must的疑问句时 否定回答常用needn t或don thaveto表示不必 而不用mustn t Mustwestayhere No youneedn t No youdon thaveto Doexerciseaboutmodalverbs 1John cometoseeustonight butheisn tverysureyet A mayB canC hastoD must2They dowellintheexam A canbeabletoB beabletoC canabletoD areableto MayItakethisbookout No you A can tB maynotC needn tD aren t 4You goandseeadoctoratoncebecauseyou vegotafever A canB mustC dareD would5 CanyouspeakJapanese No I A mustn tB can tC needn tD maynot6MustIfinishtheworktoday No you A don tB won tC needn tD mustn t 7You talkloudlyinthelibrary A don tB mustn tC needn tD don thaveto8 Youmustcomehereatsixtomorrowmorning Sorry I beheresoearly A needB canC mustD can t9Afteralongwalk theoldman betirednow A mustB hastoC needD can 用适当的情态动词填空 1 Icanplayfootball youswim 2 Don tworry You returnmethisbooktomorrow 3 Mygrandmaisill You talksoloudlyhere Can may can t 4 Ican tplaywithyou I finishmyhomeworkfirst 5 I getupearlytomorrow becauseIhaveameeting 6 youpleaseopenthewindow must must Can 9 Nobody livewithoutair 10 hespeakChinese Yes alittle 11 Thebook bereturnedbeforeSaturday 12 Icomein Yes please can Can must May 13 You giveupsmokingatonce It sbadforyourhealth 14 Excuseme Iaskyouaquestion 15 youtellmewherethestationis 16 Ifinishtheworknow No you You doitthisevening must May Can Must needn t can