初中英语情态动词 ppt课件.ppt
情态动词复习,can,could,1)表示能力（体力、知识、技能）。Can you skate?Can you lift this heavy box?Mary can speak three languages.She could read poems when she was three.,体力,技能,知识,过去的能力,能,2)表示请求和允许,-Can/May I go now?-Yes,you can.-No,you cant.-不，不行或-No,you mustnt.-不，不准-Could I come to see you tomorrow?(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-May I smoke in this room?-Yes，you may.-No,you cant.或 No，you mustnt.,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 You must come in time.-Must we hand in our exercise books today?-Yes,you must.-No,you neednt.-No，you dont have to.,必须,must 与 have to区别,must译为“必须”而have to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”I must clean the room because there are too dirty.I have to leave school because my family is poor now.If I buy that car,Ill have to borrow some money.,（无人强迫）,（无耐）,表示推测、可能性,might-may-must 也许、可能、一定 1He might be very busy now.2He may be very busy now.3.He must be very busy now.表示推测的否定形式只有cant.,不可能或肯定不,1 Youre Toms good friend,so you _ know what he likes best.2-Are you going to Beijing by plane?-I am not sure.I _ take a train.,Need,1.需要做.need to do2.neednt 不必You neednt worry about it.,四、shall 与should,shall 用于第一人称，征求对方的意见。shall I clean the room for you?2）should 表示应该做 You shouldnt watch TV every day。,1.-_ you play golf?-No.But I can play table tennis.,A.CanB.MayC.MustD.Should,2.-Could I go to the movie this weekend,Dad?-Yes,you _.But you have to come back before nine.,A.shallB.mustC.needD.can,3.-Is John coming by train?-He should,but he _ not.He likes driving his car.,A.mustB.canC.mayD.need,4.-Could I use your pen?-Of course you _.,A.mustB.mayC.canD.need,5.-Will you stay here for dinner?-Sorry,I _.I have something important to do.,A.dont B.didntC.needntD.cant,6.-Is your brother playing computer games,Ted?-He _ do that because the computer doesnt work.,A.may notB.cantC.mustntD.neednt,7.-David,is that man your head teacher?-It _ be him.Hes the tallest in our school.But that man is short.,A.mustntB.cantC.needntD.wont,8.John,you neednt do your work today,you _ do it tomorrow if youre tired.,A.mustB.mayC.cant,9.-Are you going to Beijing by plane?-So I am not sure.I _ take a train.,A.shouldB.mayC.mustD.will,10.-_ I swim in that river?-No,you _.Its dangerous to swim in it.,A.Must;cantB.Can;may notC.May;mustnt,11.-Mom,_ I play computer games?-Yes,you can.But you have to finish your homework first.,A.mustB.mayC.willD.need,12.-Must I stay at home and take care of her?-No,you _.,A.mustntB.wontC.cantD.neednt,13.-Must I go and do it now?-No,you _.We still have two more days.,A.shoudntB.cantC.needntD.wont,14.Its nearly seven oclock.Jack _ be back home at the moment.,A.mustB.needC.couldD.can,15.-May I do the rest of the work tomorrow?-Yes,of course.You _ finish it today.,A.mustB.mustntC.neednt,16.You have already tried your best,so you _ worry about the matter.,A.cantB.needntC.mustntD.couldnt,17.You look tired now.You _ stay at home and have a rest.,A.had toB.had betterC.would like toD.would rather,
