初中英语情态动词课件.ppt

情态动词复习,can,could,1)表示能力（体力、知识、技能）。Canyouskate?Canyouliftthisheavybox?Marycanspeakthreelanguages.Shecouldreadpoemswhenshewasthree.,体力,技能,知识,过去的能力,能,2)表示请求和允许,-Can/MayIgonow?-Yes,youcan.-No,youcant.-不，不行或-No,youmustnt.-不，不准-CouldIcometoseeyoutomorrow?(婉转语气，不表过去时）,此时可与may互换,可以,may,might表示请求和允许-MayIsmokeinthisroom?-Yes，youmay.-No,youcant.或No，youmustnt.,此时可与can互换,可以,must,1)表示必须、必要。是说话人的主观看法Youmustcomeintime.-Mustwehandinourexercisebookstoday?-Yes,youmust.-No,youneednt.-No，youdonthaveto.,必须,must与haveto区别,must译为“必须”而haveto多表示客观存在的环境所限,即客观要求(无奈)而为之，多译为“不得不干某事”Imustcleantheroombecausetherearetoodirty.Ihavetoleaveschoolbecausemyfamilyispoornow.IfIbuythatcar,Illhavetoborrowsomemoney.,（无人强迫）,（无耐）,表示推测、可能性,might-may-must也许、可能、一定1Hemightbeverybusynow.2Hemaybeverybusynow.3.Hemustbeverybusynow.表示推测的否定形式只有cant.,不可能或肯定不,1YoureTomsgoodfriend,soyou_knowwhathelikesbest.2-AreyougoingtoBeijingbyplane?-Iamnotsure.I_takeatrain.,Need,1.需要做.needtodo2.neednt不必Youneedntworryaboutit.,四、shall与should,shall用于第一人称，征求对方的意见。shallIcleantheroomforyou?2）should表示应该做YoushouldntwatchTVeveryday。,1.-_youplaygolf?-No.ButIcanplaytabletennis.,A.CanB.MayC.MustD.Should,2.-CouldIgotothemoviethisweekend,Dad?-Yes,you_.Butyouhavetocomebackbeforenine.,A.shallB.mustC.needD.can,3.-IsJohncomingbytrain?-Heshould,buthe_not.Helikesdrivinghiscar.,A.mustB.canC.mayD.need,4.-CouldIuseyourpen?-Ofcourseyou_.,A.mustB.mayC.canD.need,5.-Willyoustayherefordinner?-Sorry,I_.Ihavesomethingimportanttodo.,A.dontB.didntC.needntD.cant,6.-Isyourbrotherplayingcomputergames,Ted?-He_dothatbecausethecomputerdoesntwork.,A.maynotB.cantC.mustntD.neednt,7.-David,isthatmanyourheadteacher?-It_behim.Hesthetallestinourschool.Butthatmanisshort.,A.mustntB.cantC.needntD.wont,8.John,youneedntdoyourworktoday,you_doittomorrowifyouretired.,A.mustB.mayC.cant,9.-AreyougoingtoBeijingbyplane?-SoIamnotsure.I_takeatrain.,A.shouldB.mayC.mustD.will,10.-_Iswiminthatriver?-No,you_.Itsdangeroustoswiminit.,A.Must;cantB.Can;maynotC.May;mustnt,11.-Mom,_Iplaycomputergames?-Yes,youcan.Butyouhavetofinishyourhomeworkfirst.,A.mustB.mayC.willD.need,12.-MustIstayathomeandtakecareofher?-No,you_.,A.mustntB.wontC.cantD.neednt,13.-MustIgoanddoitnow?-No,you_.Westillhavetwomoredays.,A.shoudntB.cantC.needntD.wont,14.Itsnearlysevenoclock.Jack_bebackhomeatthemoment.,A.mustB.needC.couldD.can,15.-MayIdotherestoftheworktomorrow?-Yes,ofcourse.You_finishittoday.,A.mustB.mustntC.neednt,16.Youhavealreadytriedyourbest,soyou_worryaboutthemat