英语人教版八年级下册unit3　SectionA.ppt

Unit3Couldyoupleasecleanyourroom?,SectionA,dothedishes,sweepthefloor,foldtheclothes,Whatchoresdoyoudoeveryday?,makethebed,takeoutthetrash,1aDiscusswithyourpartnersaboutthechoresyoudoathome.,1.dothedishes2.sweepthefloor3.takeoutthetrash4.makeyourbed5.foldyourclothes6.cleanthelivingroom,1bListenandcheck()：whatkindofchoresdoMomandPeterdo？,1cPairwork,A:Couldyoupleasesweepthefloor?B:Yes,sure./Imsorry,butImreadingthenewspaper.,2aListeningandcheck“yes”or“no”.,2bWhydoesPetersfathersay“no”?,2c.Pairwork,A:CouldIpleaseuseyourcomputer?B:Sorry.Imgoingtoworkonitnow.A:Well,couldIwatchTV?B:Yes,youcan.Butfirstyouhavetocleanyourroom.,3a.Fillintheblankswith“make”or“do”.,A:Ihateto_chores.B:Well,Ihatesomechorestoo,butIlikeotherchores.A:Really?Doyouliketo_thelaundry?B:No,Idont.Itsboring.,do,do,A:Iagree.Doyouliketo_yourbed?B:No,notreally.ButIliketo_thedishes,becauseitsrelaxing.AndIliketo_breakfast,becauseIliketocook.,make,make,do,3bWritesomechoresyoudoanddecidewhichchoresyoulikeandwhichyoudontlike.,cleanthebikelikedothedishesdontlikemakethetabledontlikedoshoppinglikedocookingdontlike,A:IlikecleaningthebikebecauseIcanbeoutside.B:Idontlikedoingthedishesbecauseitsboring.,情态动词用法小结1.情态动词不能表示正在发生或已经发生的事情,只表示期待或估计某事的发生。2.情态动词除ought和have外,后面只能接不带to的不定式。,3.情态动词没有人称,数的变化,即情态动词第三人称单数不加-s。4.情态动词没有非谓语形式,即没有不定式、分词等形式。,could与can的区别could与can都是情态动词,could是can的过去式。二者都可用于表示请求,但是用法稍有不同。,can表示一般性的请求,语气随便,常用于熟人之间或长辈对晚辈,上级对下级的场合。e.g.Canyoutellusyourstory,Tony?Tony,你能给我们讲讲你的故事吗？,could表示有礼貌的请求,语气委婉,常用于非熟人之间或晚辈对长辈,下级对上级的场合。比如：-CouldyoutellusifitsnowsinwinterinAustralia?-Sure.-请告诉我们,澳大利亚冬天下雪吗?-当然可以。,注意：1.提出委婉的请求在回答中不可用could。A:CouldIhavethetelevisionon?B:Yes,youcan./No,youcant.2.在否定、疑问句中表示推测或怀疑用couldnt。Hecouldntbeabadman.他不大可能是坏人。,may和might表示允许或请求;表示没有把握的推测;may放在句首,表示祝愿。MayGodblessyou!Hemightbeathome.注意:might表示推测时,不表示时态，只是可能性比may小。,1.两词都是“必须”的意思,haveto表示客观的需要,must表示说话人主观上的看法,既主观上的必要。,haveto和must,Mybrotherwasveryill,soIhadtocallthedoctorinthemiddleofthenight.我弟弟病得很厉害,我只得半夜里把医生请来。(客观上需要做这件事)Hesaidthattheymustworkhard.他说他们必须努力工作。(主观上要做这件事),2.haveto有人称、数、时态的变化,而must只有一种形式。但must可用于间接引语中表示过去的必要或义务。Hehadtolookafterhissisteryesterday.,3.在否定结构中:donthaveto表示“不必”,mustnt表示“禁止”。Youdonthavetotellhimaboutit.你不一定要把此事告诉他。Youmustnttellhimaboutit.你一定不要把这件事告诉他。,用情态动词can/could,cant,may,must,mustnt,neednt填空。1.-_youcomeandplaywithusnow?-ImafraidI_.I_dothecooking.I_comelater.2.-_wecleanthewindowstoday?-No,you_.You_cleanthemtomorrow.,Could,cant,must,can,Must,neednt,can,3.-_IwatchTVthisev