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1、Unit3Couldyoupleasecleanyourroom?SectionA(Grammarfocus-4c)Step1Revision根据所学内容，写出下列短语。foldone’sclothes,dothedishes,useone’scomputer,takeouttherubbishmakethebed,sweepthefloor,stayoutlate,beangrywithsb.,takesb.forawalkcleanthelivingroom,workon,comeover,dothehousework
2、,getarideStep2Presentation阅读下列句子，观察问句的用法及回答。CouldIgooutfordinnerwithmyfriends?Sure,thatshouldbeOK.Couldwegetsomethingtodrinkafterthemovie?No,youcan’t.Youhaveabasketballgametomorrow.Couldyoupleasetakethedogforawalk?OK,butIwanttowatchoneshowfirst.Couldyoupleasetakeo
3、uttherubbish?Yes,sure.Step3GrammarCouldyou（please）+V-原形？表示委婉地提出请求1.Couldyoupleasecleanyourroom?Yes,sure./Ofcourse./Certainly./Allright.2.Couldyoupleasedothedishes?Sorry,Ican’t.Ihavetodomyhomework.在表示请求帮助或请求允许的疑问句中，常用could代替can，以表示礼貌，委婉或不确定的语气，而can则不具备这些语气。这种情况下不能把
4、could看作can的过去式。以上两句中用could是为了表示礼貌的请求。表示请求帮助或请求允许时，除了can,could之外，还可以用may，句子的表达方式也各有不同，可以用不同的方式来表示同一个概念。例：①Could/Can/MayIuseyourcarforaday?②IwonderifIcoulduseyourcarforaday?对于①、②句所作允答可以各种各样，如同意可以说Yes或Sure或Certainly，还可说Yes,(do)please.或Ofcourse.(youmay/can).或Goahead,p
5、lease.或That’sOK/allright;如果不同意，可以说I’msorryyoucan’t.或I’mreallysorry,butIhavetouseittoday.要避免说No,youcan’t.这样显得很不礼貌。否定回答通常用委婉语气。③DoyoumindifIuseyourcarforaday?对于句③所作回答可以说Nevermind./Notatall.表“不介意”。不能用Yes./Sure./Ofcourse./Certainly.等。无论肯定还是否定应答中，要避免使用could，要用can或may。因
6、为应答须用确定的语气。而could在表请求的问句中是为了表示礼貌或委婉语气，用在应答中则成了不确定语气，与情理不符。所以应答中不说Yes,youcould.或No,youcouldn’t.而要说Yes,youcan.或Sorry./No,youcan’t.—CouldIpleaseuseyourcomputer?—Sorry,I’mgoingtoworkonitnow.—Well,couldIwatchTV?—Yes,youcan.CouldI/youplease…？表示一种有礼貌的请求或提议，其后连接原形动词，比Cany
7、ou/I…？语气更委婉。类似句型有：Wouldyoulike+sth./todosth.?MayI+dosth.?Shallwe+dosth.?Wouldyoumind+sth./doingsth.?What/Howabout+sth./doingsth.?肯定回答有Sure./Ofcourse./Certainly./OK./Great./Well./Goodidea./Iagree.等。否定回答有Sorry…/No,youcan’t.等。Step4PracticeMakeupdialoguesusingthesente
8、ncesinGrammarFocuswithyourpartner.A:Couldyoupleasetakethedogforawalk?B:OK,butIwanttowatchoneshowfirst.4aWriteRforrequestsandPforpermission.Thenmatcheach
