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1、Period4GrammarModalVerbs1.Ifyou______smoke,pleasegooutside.A.canB.shouldC.mustD.may2.—ShallIinformhimofthechangeoftheschedulerightnow? —Iamafraidyou______,incasehecomeslateforthemeeting.A.willB.mustC.mayD.can3.—Willyoureadmeastory,Mummy? —OK.You______
2、haveoneifyougotobedassoonaspossible.A.mightB.mustC.couldD.shall4.Thepolicestillhaven’tfoundthelostchild,butthey’redoingallthey______.A.canB.mayC.mustD.should5.Noone_______becomparedwithYaoMinginplayingbasketball.A.canB.needC.mustD.mightHaveALkThenbylu
3、nchtimetheywouldallbesold.Bynowhisrestaurantoughttobefullofpeople.Whatcouldhavehappened?Nothingcouldbebetter,…Somethingterriblemusthavehappenedif…Perhapsheshouldgotothelibraryandfindout.Ithinkshe_______apologisetothepublic.You________goandseethedoctor
4、.我认为她应该向公众道歉。你应当去找医生看看病。oughttooughttoFillintheblanksaccordingtotheChinese.Titanic______beagoodmovie.Weknowifwekeepatitwe_______succeed.泰坦尼克号应该是部好电影。我们知道如果我们坚持下去就应该会成功。shouldshouldWe______putonwarmclothesinwinter.冬天的时候，我们得穿上温暖的衣服。你得把面粉和黄油和在一起。You_____
5、__mixtheflourandthebutter.havetohavetoInEnglandtraffic_____keeptotheleft.在英国，车辆必须靠左行驶。Allpassengers______wearseatbelts.所有乘客都必须系安全带。mustmust上面的空你都填对了吗？如此多的情态动词，我们应当如何使用呢？接下来就进行详细的讲解。should和oughtto都为“应该”的意思，可用于各种人称。oughtto的语气稍重一些。Yououghtto(should)follo
6、wyourteacher’sadvice.oughtto／shouldYoushouldgotoschoolrightaway.It’seighto’clocknow.Heshouldbeatwork.Itseemssounfairthisshouldhappentome.Youshouldhaveremindedmeofthemeeting.Whatshouldwedonow?sumup义务表惊讶：竟然推测用于第一人称疑问句，询问对方的意愿表责备，谴责should和oughtto后面跟动词不定式
7、的完成式,其肯定句表示“过去应该做而未做”,其否定句则表示“过去不该做但做了”。Youshould/oughttohavemadethedecisionaweekago.Ishouldn'thavemadesuchafoolishmistake.注意must的用法1.表示主观的义务和必要,主要用于肯定句和疑问句,意思为“必须……，得……，要……”；由must引起的疑问句，肯定回答要用must或have to,否定回答要用needn’t或don’t have to,意思是“不必”；must的否定形式
8、mustn’t表示禁止，意思是“不能,不许”。must/haveto如：—MustI finish the task right now?我现在必须完成这个工作吗？—Yes,youmust. / Yes, you have to.是的。(—No,youneedn’t./No,youdon’thaveto.不,不必。)have to的用法1.must表示一种主观的需要，而have to表示一种客观的需要，意思是“不得不”。口语中常翻译成“得”。如：Ihavetoattendanimp
