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1、Unit3Couldyoupleasecleanyourroom?Period3SectionA4a-4cGrammarfocusRevision根据所学内容，写出下列短语。叠衣服做菜用某人的电脑扔垃圾铺床扫地熬夜生某人的气带……出去散步foldone’sclothesdothedishesuseone’scomputertakeouttherubbishmakethebedsweepthefloorstayoutlatebeangrywithsb.takesb.forawalk打扫客厅在……上工作过来做家务搭车cleanthelivingroomwork
2、on…comeoverdothehouseworkgetarideenjoydinnerwithmyfamily.A:Mum,couldIgooutfordinnerwithmyfriends?B:Sure,thatshouldbeOK.A:CouldIgetsomethingtodrinkwithmyfriendsafterthemovie?B:Sure,youcan.A:CouldIgetsomethingtodrinkwithmyfriendsafterthemovie?B:No,youcan’t,youhaveabasketballgametomo
3、rrow.takethedogforawalk遛狗A:Canyoupleasetakethedogforawalk?B:OK,butIwanttowatchoneshowfirst.takeouttherubbish扔垃圾A:Canyoupleasetakeouttherubbish?B:Yes,sure.CouldIgooutfordinnerwithmyfriends?Sure,thatshouldbeOK.Couldwegetsomethingtodrinkafterthemovie?No,youcan’t,youhaveabasketballgam
4、etomorrow.GrammarFocusCanyoupleasetakethedogforawalk?OK,butIwanttowatchoneshowfirst.Canyoupleasetakeouttherubbish?Yes,sure.KeysentencestructuresCouldyou（please）+V-原形？表示委婉地提出请求1.Couldyoupleasecleanyourroom?Yes,sure./Ofcourse./Certainly./Allright.2.Couldyoupleasedothedishes?Sorry,Ic
5、an’t.Ihavetodomyhomework.—Peter,couldyoupleasetakeoutthetrash?—Sure,Mom. —Couldyoupleasedothedishes?—Sorry,Ican’t.Ihavetodomyhomework.重难点点评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
6、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
7、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.
8、could是can的过去式,表示与过去有关的能力和推测:e.g.W
