專(zhuān)題19情態(tài)動(dòng)詞Asastudent,weshouldandshouldn't...什么是情態(tài)動(dòng)詞？Weshouldstudyhard.Weshouldgetupearlyhard.Weshouldnotsleepinclass.Weshouldnotplaywithphoneinclass.1.情態(tài)動(dòng)詞+do（肯定）2.情態(tài)動(dòng)詞+notdo（否定）情態(tài)動(dòng)詞的疑問(wèn)句Weshouldstudyhard.Shouldyoustudyhard?情態(tài)動(dòng)詞+sb.+do肯：Yes,weshould否：No,weshouldn't1.表示能力。（能夠、會(huì)）can-could可以Icanswim.我會(huì)游泳。Icanplaythepiano.我會(huì)彈鋼琴。2.表示

請(qǐng)求和許可。（可以）CanIcomein?我能進(jìn)來(lái)嗎？CouldIcomein?我能進(jìn)來(lái)嗎？(could語(yǔ)氣更委婉)Yes,youcan/No,youcan't用could提問(wèn)，用can/can't回答can-could可以習(xí)題can-could可以_____youwaitafewmoreminutes?Itwillbeyourturnsoon.A.MustB.ShallC.CouldD.MightCcould表示請(qǐng)求，語(yǔ)氣更委婉習(xí)題can-could---CouldIuseyourdictionary?---Yes,you____.A.needB.couldC.canD.shouldCcould提問(wèn)，用can/can't回答3.表推測(cè)，用于疑問(wèn)和否定can-couldCanitbetrue?這可能是真的嗎？（可能）Hecan'tbeathief!他不可能是小偷?。ú豢赡埽┳⒁猓篶an't表推測(cè)是100%不可能習(xí)題can-couldHe____befiftyyearsold!Helookssoyoung.A.maynotB.can'tC.mustnotD.needn'tB他不可能有50歲，他看起來(lái)這么年輕can't不可能習(xí)題can-couldTom___beathome,forhehasgonetoAmerica.A.can'tB.mustn'tC.shouldn'tD.maynotA湯姆不可能在家，因?yàn)樗呀?jīng)去美國(guó)了。can't不可能習(xí)題can-could---Whoissinginginthegarden?---It____beMr.Brown.Heismakingcoffeeintheroom.A.shouldn'tB.mustn'tC.can'tD.maynotC---誰(shuí)正在花園里唱歌？---不可能是布朗先生，他正在房間做咖啡。習(xí)題can-couldTom___beathome,forhehasgonetoAmerica.A.can'tB.mustn'tC.shouldn'tD.maynotA湯姆不可能在家，因?yàn)樗呀?jīng)去美國(guó)了。can't不可能1.表許可may-mignt也許MayIborrowyourbook?肯定回答：Yes,youmay.否定回答：No,youmustn't/can't2.表推測(cè)“也許，可能”may-mignt也許Marymay/might（not）cometomybirthdayparty.瑪麗可能(不)會(huì)來(lái)參加我的生日派對(duì)。習(xí)題may-mightHe_____cometotheparty.Iamnotsure.A.canB.mustC.shouldD.mayD他可能回來(lái)參加聚會(huì)，我不確定may也許，可能習(xí)題may-mightBringanumbrellawithyou.It____rain.A.canB.mustC.mightD.shouldC你帶把傘吧，可能要下雨might也許，可能1.表必要性。must一定/必須Imuststudyhardtogotocollege.我必須要好好學(xué)習(xí)考上大學(xué)。

MustIpayfortheticketatonce?我必須要馬上支付票費(fèi)嗎？Yes,youmust/No,youneedn't是，必須/不，不需要用must提問(wèn)，否定回答用needn't（不需要）2.表推測(cè)，是“一定”must一定/必須must的否定推測(cè)是can't“不可能”Shemustbeill,forshelookspale.她一定是病了，因?yàn)樗雌饋?lái)很蒼白。Hecan'tbethatfoolish.他不可能這么愚蠢。習(xí)題must---Look,it____beJackontheplayground.---It___behim.BecauseIsawhimentertheclassroomjustnow.A.must,mustn'tB.can,can'tC.may,mustn'tD.must,can'tD--看，一定是杰克在操場(chǎng)。--不可能是他，因?yàn)槲覄偪吹剿M(jìn)教室了。習(xí)題must---Canwewearanyclothesweliketoschool,Dad?---No,youcan't.You____wearuniforms.A.mightB.mustC.willD.wouldB---我們可以穿自己喜歡的任何衣服去學(xué)校嗎？---不，你不可以。你必須穿校服。must必須3.否定mustn't“禁止”must一定/必須Youmustn'tplaywithfire.你禁止玩火。習(xí)題must---MayIparkmycarhere?---No,you____.CarsarenotallowedtoparkA.can'tB.mustn'tC.don'thavetoD.needn'tB---我可以在這兒停車(chē)嗎？---不，你禁止在這兒停車(chē)。mustn't禁止1.用于第二、三人稱(chēng)，表命令，禁止，威脅等。shallIfyoudothisagain,yoshallbepunished.如果你再這么做，將會(huì)被處罰。（威脅）Youshallneverdeceiveothers.你絕不能欺騙他人。（禁止）2.用于第一人稱(chēng)，表征求意見(jiàn)shallShallIdoitnow?我要現(xiàn)在做嗎？need需要Youneedn'tgetupsoearly.你不需要起這么早習(xí)題must---MustIgetupbeforesixo'clocktomorrowmorning?---No,you____.TomorrowisSaturday.A.mustn'tB.can'tC.needn'tD.maynotCMustI...?Yes,youmust/No,youneedn'tneedn't不需要習(xí)題must---Let'sgotothelibrarybybus.(2016年湖北技能高考)---It'snotfar.We____takeabus.A.needn'tB.can'tC.mustn'tD.shouldn'tA--我們坐公汽去圖書(shū)館吧。--不遠(yuǎn)，我們不需要坐公汽。ne