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.,情態(tài)動(dòng)詞用法小結(jié)1.情態(tài)動(dòng)詞不能表示正在發(fā)生或已經(jīng)發(fā)生的事情,只表示期待或估計(jì)某事的發(fā)生。2.情態(tài)動(dòng)詞除ought和have外,后面只能接不帶to的不定式。,3.情態(tài)動(dòng)詞沒(méi)有人稱(chēng),數(shù)的變化,即情態(tài)動(dòng)詞第三人稱(chēng)單數(shù)不加-s。4.情態(tài)動(dòng)詞沒(méi)有非謂語(yǔ)形式,即沒(méi)有不定式、分詞等形式。,could與can的區(qū)別could與can都是情態(tài)動(dòng)詞,could是can的過(guò)去式。二者都可用于表示請(qǐng)求,但是用法稍有不同。,can表示一般性的請(qǐng)求,語(yǔ)氣隨便,常用于熟人之間或長(zhǎng)輩對(duì)晚輩,上級(jí)對(duì)下級(jí)的場(chǎng)合。e.g.Canyoutellusyourstory,Tony?Tony,你能給我們講講你的故事嗎？,could表示有禮貌的請(qǐng)求,語(yǔ)氣委婉,常用于非熟人之間或晚輩對(duì)長(zhǎng)輩,下級(jí)對(duì)上級(jí)的場(chǎng)合。比如：-CouldyoutellusifitsnowsinwinterinAustralia?-Sure.-請(qǐng)告訴我們,澳大利亞冬天下雪嗎?-當(dāng)然可以。,注意：1.提出委婉的請(qǐng)求在回答中不可用could。A:CouldIhavethetelevisionon?B:Yes,youcan./No,youcant.2.在否定、疑問(wèn)句中表示推測(cè)或懷疑用couldnt。Hecouldntbeabadman.他不大可能是壞人。,may和might表示允許或請(qǐng)求;表示沒(méi)有把握的推測(cè);may放在句首,表示祝愿。MayGodblessyou!Hemightbeathome.注意:might表示推測(cè)時(shí),不表示時(shí)態(tài)，只是可能性比may小。,1.兩詞都是“必須”的意思,haveto表示客觀的需要,must表示說(shuō)話人主觀上的看法,既主觀上的必要。,haveto和must,Mybrotherwasveryill,soIhadtocallthedoctorinthemiddleofthenight.我弟弟病得很厲害,我只得半夜里把醫(yī)生請(qǐng)來(lái)。(客觀上需要做這件事)Hesaidthattheymustworkhard.他說(shuō)他們必須努力工作。(主觀上要做這件事),2.haveto有人稱(chēng)、數(shù)、時(shí)態(tài)的變化,而must只有一種形式。但must可用于間接引語(yǔ)中表示過(guò)去的必要或義務(wù)。Hehadtolookafterhissisteryesterday.,3.在否定結(jié)構(gòu)中:donthaveto表示“不必”,mustnt表示“禁止”。Youdonthavetotellhimaboutit.你不一定要把此事告訴他。Youmustnttellhimaboutit.你一定不要把這件事告訴他。,用情態(tài)動(dòng)詞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