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1、Unit8OurClothesTopic2WecandesignourownuniformsSectionB-情态动词can&haveto的用法Yes,shecan.Canshecometotheparty?Canshe…No,hecan’t.Hehastostudy.Canhegotothebaseballgame?Canhe…Cantheycometotheparty？No，theycan’t.Theyhavetostudyforthemathtest.Canthey…CanyoucometomypartyonSaturday?Sure,I’dl
2、oveto.Sorry,Imuststudyforamathtest.Canyougotothemoviestomorrownight?Sure.Thatsoundsgreat.I’mafraidnot.Ihavetheflu.Canhegototheparty?No,hecan’t.Hehastohelphisparents.Canshegotothebaseballgame?No.she’snotavailable.Shemustgotothedoctor.Cantheygotothemovies?No,they’renotfree.Theymi
3、ghthavetomeettheirfriends.GrammarFocus情态动词主要有：may/might,can/could,must,haveto,shall/should,will/would,oughtto,need,dare,usedto。Grammarfocus现在我们来着重学习情态动词can以及haveto的用法。其特征主要有：1.不能独立作谓语，只能和动词原形一起构成谓语，表示说话人的语气和情态。2.没有人称和数的变化。(haveto除外)3.否定形式：在其之后加not(haveto除外)。疑问形式：情态动词提到主语之前(have
4、to除外)。can为情态动词,在本单元中表示请求,用于发出邀请，后跟动词原形。当同意接受对方的邀请时,常用Sure,I’dloveto./Certainly./Ofcourse.等来回答；若不接受,常用Sorry等来有礼貌地拒绝,一般情况下需要说明不能接受邀请的原因以表示歉意。—Canyoucometomybirthdaypartytomorrow？明天你来参加我的生日聚会，好吗？—Sorry,Ican’t.Iamgoingtovisitmygrandpa.很抱歉，我来不了，我要去看我爷爷。1.can/may都可表示“许可”。may用于较正式、客气的
5、场合，而can比较随便（口语）。Youmay/cansmokehere.Borrowersmaynottakeoutofthelibrarymorethantwobooksatatime.Thepolicemansaysyoucan’tparkhere.(2)May/CanI/we…?表示征询对方许可。Canyou…?表示请求。①—MayIuseyourphone?—Yes,youmay./Yes,please./No,youmaynot./No,youmustn’t./No,you’dbetternot./I’mafraidnot./I’msorr
6、y.I’dratheryoudidn’t.②—CanIgooutandplay,Mum?—Yes/Certainly,youcan./No,youcan’t.③—Canyouhelpmewiththisbag?—Withpleasure./Sorry,Ican’t.Mr.Reedlookspale.Hemaybeill.(事实上的可能).Mr.Readisinpoorhealth.Hecanbeillatanytime.(逻辑、理论上的可能)Thisnewsmaybetrue.(=might/could)(事实上的可能)WangWeicanberea
7、llystubborn.(有时或偶然可能会)(=could)(3)都可表示“可能性”肯定句否定句Thisnewsmaynotbetrue.(也许不,=mightnot)Thisnewscan’tbetrue.(不可能,=couldn’t)疑问句Canthisnewsbetrue?(=Could)≠Maythisnewsbetrue?(4)can还可表示“能力”、“能够”—Youcanswim,can’tyou?—No,Ican’t.Ican’tpromiseanything,butI’lldowhatIcan.Ticketscanbeboughtfr
8、omtheTouristInformationCenter.2.might/could分别为may和can的
