smokev.吸烟takeanX-ray照X光cameran.照相机—Bytheway,mayIborrowyourcamera?（顺便问一下）—Noproblem.没问题。Icouldnotrideahorseatfive.NowIcan.rideahorse骑马rideabike骑自行车...couldnot...Now...can...playtennis打网球...couldnot...Now,...can...swim/haveaswim游泳...couldnot...Now,...can...flyakite放风筝...couldnot...Now,...can...skiv.滑雪...couldnot...Now,...can...skatev.滑冰...couldnot...Now,...can...Usingcanorcouldtotalkaboutability.1.Weusecantotalkaboutpresentability.Weusecouldtotalkaboutabilityinthepast.e.g.MilliecanspeakgoodEnglish.Shirleycannotrideahorse.TheoldmancouldswimacrosstheYangtzeRiver.e.g.—CanIborrowyourbike,Millie?—Yes,youcan.Hereyouare.—CouldIsmokehere?—Sorry,I’mafraidyoucan’t.—MayIuseyourmobilephone?—Ofcourseyoumay.2.Weusecan,couldormaytoaskforpermission.Couldsoundsmorepolitethancan.Mayisformal.1.can与couldcan常用于口语中，表示非正式的请求，请求对象一般是家人或朋友。e.g.—CanIborrowyourbook,Simon?西蒙,我可以借一下你的书吗？—Ofcourse.当然可以。—CanIhavesomemilk,Mum?妈妈，我可以喝点牛奶吗？—Yes,youcan.好的。could是can的过去式。在口语中，could常用来代替can向对方更委婉地提出请求，用法上比can正式，可以用于向老师或长辈提出请求，这时could不表示过去，回答一般还是用can。e.g.—CouldIuseyourcomputer,please?请问，我可以用一下你的电脑吗？—Yes,youcan.可以。—CouldIhandinourhomeworklater,MrLin?林老师，我可以稍后交作业吗？—No,youcan’t.不，不行。2.maymay也可以用来征求对方意见，意为“可以”，相当于could，用法也比can更正式，更礼貌，一般用于向陌生人或所尊敬的人请求许可。e.g.—MayIaskyouaquestion?我可以问你一个问题吗？—Yes,please.可以，请问。—MayIcomein,MrWu?吴老师，我可以进来吗？—No,youmaynot.不行。1.____youspeakJapanese?2.______youplaythepianolastyear?3.____youcook?4.______youuseacomputerwhenyouwerethree?Askandanswerquestionsusingcanorcould.CanCouldCanCould5.______yourideabicyclewhenyouwereveryyoung?6.______youunderstandEnglishTVprogrammesin2000?CouldCouldThestudentsaregoingtoSouthHill.AmyistalkingtoMrWuaboutthetrip.Completetheirconversationwithcan,co...
