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Unit3Couldyoupleasecleanyourroom?情态动词could的用法1.情态动词could表示礼貌地提出要求。Couldyou(please)do...?/Couldyoudo...,please?意为“请你做……好吗?”,表示请求对方做某事。表示否定意义时,用“Couldyoupleasenotdo...?”意为“请不要做……好吗?”肯定回答为“Yes,sure./Sure./Ofcourse./Noproblem.”。否定回答为“Sorry./No,Ican’t.”,其后一般委婉地加上原因。例如:—Couldyoupleasecleanyourroom?请你打扫一下房间好吗?—Yes,sure.好的,当然。—Couldyousweepthefloor,please?请你把地扫一下好吗?—Sorry.Ihavetofinishmydrawing.对不起。我必须完成我的画。2.情态动词could表示委婉地请求许可。CouldI...?意为“我可以……吗?”,表示请求对方允许自己做某事。肯定回答为“Yes,youcan./Sure./Ofcourse.”。否定回答为“Sorry./I’mafraidnot./I’msorryyoucan’t.”。例如:—CouldIuseyourcomputer?我能用一下你的电脑吗?—Sorry.I’mworkingonit.对不起。我正在用。3.情态动词could作为can的过去式时,不表示委婉语气,而表示过去的能力或可能性,对其一般疑问句的回答仍可用could。例如:Theboycouldreadwhenhewasfiveyearsold.这个男孩5岁时就能看书了。Ⅰ.单项填空(A)1.Couldyoupleaseyourbedroom,Peter?Yourmomwillbebacksoon.A.sweepB.sweepingC.tosweepD.sweeps(A)2.CouldyoupleaseTVnow?I’mstudyingformytest.A.notwatchB.nottowatchC.don’twatchD.can’twatch(B)3.—Couldyougotoseethenewmoviewithmenow?—Sorry,I.Look,it’stimeformetowatchReadersonCCTV.A.canB.can’tC.needn’tD.must(D)4.—CouldIgooutwithJacktonight?—.Youhavetostayhome.A.Yes,youcouldB.Yes,youcanC.Sorry,youcanD.No,youcan’t(C)5.—CouldIinvitemyfriendstothepartyonSaturday,Mom?—Ofcourseyou.Thatsoundslikefun.A.mayB.couldC.canD.mustⅡ.用can或could的适当形式填空,每空一词1.Heissadhecan’trunanymorebecauseofhisillness.2.—Couldhewashhisclothesbyhimselfwhenhewasyoung?—Yes,hecould.3.Thelittlegirlcouldn’twalkwhenshewastwoyearsold.4.—CouldIaskyousomequestions?—Yes,youcan.Ⅲ.根据汉语意思完成句子,每空一词1.你能把电视关上吗?CouldyoupleaseturnofftheTV?2.我今晚可以在外面待到9点吗?CouldIstayoutuntil9:00tonight?3.——我今晚能出去和朋友散步吗?——当然,那应该没问题。—CouldIgooutforawalkwithmyfriendsthisevening?—Sure,thatshouldbeOK.4.——你能把书递给我吗?——当然。—Couldyoupassmethebook?—Yes,sure.5.——我可以借你的电脑吗?——对不起。我不能把电脑借给你。—CouldIborrowyourcomputer?—Sorry.Ican’tlendittoyou.