高中英语——情态动词1.ppt

7.—WhencanIcomeforthephotos?Ineedthemtomorrowafternoon.—They_____bereadyby12:00.A.canB.should C.mightD.needB8.Youcan’timaginethatawell-behavedgentleman_____besorudetoalady.mightB.need C.shouldD.wouldC表示惊讶的语气Whatarethey?can—couldmay—mightwill—wouldshall—shouldmust—can’t情态动词(modalverbs)Howmanyusages?疑问句式肯定回答否定回答Can/Couldyoudosth.?Yes,I/wecan/could.No,I/wecant/couldnt.MayIdosth.?Yes,youmay.No,youmustnt/maynotMustI/wedosth.?Yes,youmust.No,youneednt/donthaveto.Will/Wouldyoudosth.?Sure./Certainly./Yes,ofcourse.Sorry,but.../ImafraidIcant.Shallwe/I/he/theydosth.?Yes,please./Goahead.Youdbetternot./Sorry,but....OughtIto...?Yes,youshould.No,youshouldnt.NeedIdosth.?Yes,youmust.No,youneednt/donthaveto.1)can的主要用法是：?A.?__________：?eg.Thegirlcandanceverywell.B.?_______________：eg.Canthenewsbetrue?C._____________:eg.CanIsithere?can和could：表示能力表示推测可能性表请求或允许(多用于疑问/否定句中)其他用法：表命令，惊讶，不相信...Canyouhelpmetoliftit,please?Ifyouwon’tkeepquiet,youcangetout!Youcan’tbeserious!2)could的主要用法是：FathersaidIcouldgooutwithmyfriends.A.could是can的过去式,表示过去的能力,许可和推测Weallknewthattheyoungmancouldn’tbeadoctor.B.could可代替can,表示请求,语气委婉eg.---Couldyoulendmeyourbike?---CouldIuseyourbike?---Yes,youcan.3.表示现在的可能与能力.What’sfordinner?Icouldeatahorse.Mywifeisinhospital.Ourbabycouldarriveatanytime.4.表轻微的责备。Youcouldbemorecareful.5.Theycant/couldn’thavegoneoutbecausethelightisstillon.can’t/couldn’thavedone对过去否的猜测mustdo/be现肯猜can‘tdo/be现否猜musthavedone过肯猜must表示推测，语气非常肯定，近乎确定的意