八年级英语下册《Unit 3 Could you please clean your room？》S

单击此处编辑母版标题样式单击此处编辑母版文本样式第二级第三级第四级第五级*英语教学课件系列Goforit!Unit3Couldyoupleasecleanyourroom?SectionAGrammarFocus来源：zxxk.comenjoydinnerwithmyfamily.A:Mum,couldIgooutfordinnerwithmyfriends?B:Sure,thatshouldbeOK.来源：zxxk.comA:CouldIgetsomethingtodrinkwithmyfriendsafterthemovie?B:Sure,youcan.A:CouldIgetsomethingtodrinkwithmyfriendsafterthemovie?B:No,youcan’t,youhaveabasketballgametomorrow.来源：zxxk.comtakethedogforawalk遛狗A:Canyoupleasetakethedogforawalk?B:OK,butIwanttowatchoneshowfirst.takeouttherubbish扔垃圾来源：zxxk.comA:Canyoupleasetakeouttherubbish?B:Yes,sure.CouldIgooutfordinnerwithmyfriends?Sure,thatshouldbeOK.Couldwegetsomethingtodrinkafterthemovie?No,youcan’t,youhaveabasketballgametomorrow.GrammarFocusCanyoupleasetakethedogforawalk?OK,butIwanttowatchoneshowfirst.Canyoupleasetakeouttherubbish?Yes,sure.情态动词用法只作情态动词的can/could,may/might,oughtto,must可情态可实义的 need,dare可情态可助动词的shall/should,will/would相当于情态动词的haveto,usedto情态动词的语法特征1)情态动词不能单独做谓语,除ought和have外,后面只能接不带to的不定式。2)情态动词没有人称,数的变化,但有些情态动词,如can、will也有一般式和过去式的变化。3) 情态动词的“时态”形式并不是时间区别的主要标志,不少情况下,情态动词的现在式形式和过去式形式都可用来表示现在时间、过去时间和将来时间。1)can的主要用法是： A. 表示体力或脑力的能力： e.g.Thegirlcandanceverywell.B. 表示说话的推测﹑事物的可能性等:e.g.Canthenewsbetrue?C.在口语中,can可以表示请求或允许:e.g.CanIsithere?can和could：can表示“能够”时与短语beableto同义，但can只用于一般现在时或过去时，而后者可用于各种时态。另外，can表示个人有某种能力，而beableto表示某人通过努力、克服困难做成某事，相当于succeedindoingsth.；叙述过去事实时，最好用was/wereableto，因为could只表示过去具有某种能力。如：CanyouunderstandthedifferentkindsofEnglishthesepeopleareusing?Twoyearslater,hewasabletospeakverygoodChinese.2)could的主要用法是：A.could是can的过去式,表示与过去有关的能力和推测:e.g.Weallknewthattheyoungmancouldn’tbeadoctor.B.could可以代替can表示请求,但语气较can客气、委婉:来源：zxxk.come.g.Couldyoulendmeyourdictionary?CouldIuseyourbike?3)can和could接动词的完成形式，表示可能已经做某事。can用在否定和疑问句中,表示不相信、怀疑等态度。 e.g.Theycan’thavegoneoutbecausethelightisstillon.以could或would提问时，不能再以could或would作答，而应该用can或will。如：—CouldIborrowyourdictionary?—Yes,ofcourseyoucan.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,youcan’t.2.在否定、疑问句中表示推测或怀疑用couldn’t。Hecouldn’tbeabadman. 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mustMybrotherwasveryill,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:don’thaveto表示“不必”,mustn’t表示“禁止”。Youdon’thavetotellhimaboutit. 你不一定要把此事告诉他。Youmustn’ttellhimaboutit. 你一定不要把这件事告诉他。4a.WriteRforrequestsandPforpermissions.Thenmatcheachonewiththecorrectresponse._____CouldIhangoutwithmyfriendsafterthemovie?2.____Couldyoupleasepassmethesalt?3.____CouldIborrowthatbook?4.____Couldyouhelpmedothedishes?5.____Couldyoulendmesomemoney?PRPRRYes,hereyouare.Hmm.Howmuchdoyouneed?Yes,sure.Noproblem.Ifinishedreadingitlastnight.d.Yes,butdon’tcomebacktoolate.e.No,Ican'tIcutmyfingerandI’mtryingnottogetitwet.1—d2---a3---c4---e5---b4bFillintheblanksintheconversationA:Ihateto_________chores.B:Well,Ihatesomechorestoo,butIlikeotherchores.A:Really?Great!________Iaskyouto____mewithsomechoresthen?B:Whatdoyouneedhelpwith? A:______youplease_____myclothesforme?B:Idon’twanttodothat!It’sboring!CoulddohelpCouldfoldA:OK.Then______you______dothedishesforme?B:Sure,noproblem.But_______wegotothemoviesafterthat?A:Sure,I’llfinishmyhomeworkwhileyouhelpmewiththedishes.Thenwecangotothemovies.couldpleasecould4cMakealistofthingsyourgroupneedstodoforacampingtrip.Thendiscusswhowilldobringatentthemandcompletethechart.A:CouldyoupleasebringLiuChang?B:Sure.Andcouldyouplease…?C:Sorry,Ican’t.Ihaveto…To—dolistNameBringatentLiuChangPairwork用情态动词can/could,can’t,may,must,mustn’t,needn’t填空。1.-_____youcomeandplaywithusnow? -I’mafraidI_____.I_____dothecooking.I____comelater.2.-_____wecleanthewindowstoday?    -No,you_______.You____cleanthemtomorrow. Couldcan’tmustcanMustneedn’tcan3.-____IwatchTVthisevening,mum? -No,you_______.Work_____comefirst.4.-____Icomein,please?    -Yes,please.5.Excuseme.____youtellmethewaytothecinema?Maymustn’tmustCanCanA:Couldyouhelpme,please?B:___________!A:Iwantto________theseboxestomyhomeLet’s______theboxes_____thecarnow.B:_______right.A:Oh,thebox___heavy.Canyoucarryit?B:Yes,I______A:________you_____ittomyroom?B:Certainly.完成对话CertainlytakeputinAlliscanCouldtakecan;couldWhenIwasyoungI_____climbanytreeintheforest.Learningalanguage_____bearealchallenge.couldcan选用正确的情态动词填空。Homework这个暑假你与父母要去法国去度假，你的宠物小猫Mimi需要请Jimmy帮忙照顾。请用下面的提示词给Jimmy写份留言。takecareof,takeforawalk,feedandgivesomewater,playwithhim,cleanDearJimmy,_________________