初中情态动词讲解及练习题情态动词表示语气和态度。有实际词义,但是没有单复数等词形变化。后面通常加动词原形中考主要考查can,must,may,need四个情态动词。除此之外,表示必要性的情态动词还有should,应该,这个语气比must弱,还有hadbetter(not)do,最好(不)去做,这个语气更弱。情态动词词义否定式缩略否定式can/could能够,可能can/couldnotcan’t/couldn’tmay/might可以,也许may/mightnotmayn’t/mightn’tmust必须,一定mustnotmustn’tshould应该shouldnotshouldn’toughtto应当oughtnottooughtn’ttoshall可以,必将shallnotshan’twill/would愿意,决心will/wouldnotwon’t/wouldn’tneed需要neednotneedn’t易考点:一.比较haveto和must:1)两词都是'必须'的意思,haveto表示客观的需要,must表示说话人主观上的看法,既主观上的必要。Mybrotherwasveryill,soIhadtocallthedoctorinthemiddleofthenight.我弟弟病得很厉害,我只得半夜里把医生请来。(客观上需要做这件事)Hesaidthattheymustworkhard.他说他们必须努力工作。(主观上要做这件事)2)在否定结构中:don'thaveto表示不必mustn't表示禁止,Youdon'thavetotellhimaboutit.你不一定要把此事告诉他。Youmustn'ttellhimaboutit.你一定不要把这件事告诉他。二.肯定句中,表示推测,语气最强的是must,但在否定句和疑问句中,表示怀疑,猜测,要用can’t.(mustn’t禁止,不允许,不能用来表推测;can’t不可能)Thereissomeoneknockingthedoor.ItmustbeTom.Itcan’tbeTomintheclassroom.Becauseheisillandhedoesn’tcometoschooltoday.三.情态动词的回答1.以can开头的一般疑问句,其肯定和否定回答分别用:can和can’t。(Could也是)2.以may开头的一般疑问句,其肯定和否定回答分别用:Yes,youmay./No,youmustn’t.May/might表推测时,语气最弱。表建议请求时,语气最委婉。May也可以表示祝愿。---MayIgonow?----Yes.Youmay./No,youmustn’t.WemaygotoShanghai,butwearenotsure.Mayyousuccess!3.---MustIfinishtheprojecttoday?---Yes,youmust./No,youneedn’t.四.其他Shall用于第一人称,表示征求意见,询问。Shallwehavelunchhere?Should表示义务责任。Weshouldobeytrafficrules.【课堂练习】1、(2010河北省卷31.1)—Dowehavetofinishourhomeworkthisafternoon?—Yes,you_____.A.mustB.canC.mayD.need2、(2010湖南省娄底市5.1)—MustIbeinhospitalforaweek,Doctor?—No,you.Youcangobackhometomorrow.A.mustn’tB.needn’t3、(2010江苏省盐城市3.1)Thedeskisnotdirty.You______cleanit.A.mustn’tB.shouldn’tC.needn’tC.can’t4、(2010四川省内江市23.1)—WhatisyourmothergoingtodothisSaturday?—I’mnotsure.She_____gotoseemygrandmother.A.canB.mustC.may5、(2010山东省潍坊市23.1)—IsJessicagivingusaspeechthisevening?—No,it________beher.She________toJapan.A.mustn’t;hasgoneB.mustn’t;hasbeenC.can’t;hasgoneD.can’t;hasbeen6、(2010江苏省南京市6.1)It’sthelibrary!Soyou________knowshoutingisnotallowedhere.A.canB.mustC.needD.may7、(2010浙江省衢州市24.1)Boysandgirls,don’tforgetyourreport.It______today.A.can’tfinishB.can’tbefinishedC.shouldfinishD.shouldbefinished8、(2010江苏省无锡市8.1)—MrSmithmusthavebeentoyourhomethismorning.—No,he______,becausehedidn’tknowmyaddress.A.couldn’tB.can’tC.mustn’tD.maynot9、(2010湖南长沙25.1)—MustIfinishmyhomeworkatschool?—_______.Youcandoitathomeandhanditinnextweek.A.Yes,youmustB.No,youneedn’tC.Yes,Ican10、(2010四川省成都市33.1)—Thelakeissaidtobedry.Isthattrue?—It______.Look,somekidsareswimminginit.A.mustbetrueB.can’tbetrueC.maynotbetrue11、(2010浙江省湖州市19,1)—IsthemanoverthereMr.Brown?—It_____behim.He’smuchshorter.A.mustB.can’tC.needn’tD.may12、(2010山西省26,1)—______yourAmericanfriendeatwithchopsticks?—Yes,buthecan’tusethemwell.A.CanB.ShouldC.Must13、(2010湖北省十堰市29,1)—Where’sJeff?—I’mnotsure.He______beplayingfootballontheplayground.A.needB.mightC.mustD.can14、(2010山东省莱芜市30,1)—Listen!IsitLindasinginginthenextroom?—No,it______beher.SheisstillinShanghai.A.can'tB.couldn'tC.maynotD.mightnot15、(2010贵州省铜仁市24,1)—Thispairofshoes____belongtoJack.Helikesthiskindverymuch.—It____behis.It’stoolargeforhim.A.can;can’tB.may;needn’tC.must;mustn’tD.must;can’t16、(2010湖北省荆门市29,1)You_____smoke.Youareonly14anditisn’tallowed.A.mustn’tB.don’thavetoC.needn’tD.won’t17、(2010湖北省襄樊市34,1)—CanIgotothemovie,Mum?—Certainly,Butyou_______bebackbyteno’clock.A.canB.mayC.mightD.must18、(2010广西省定西市22,1)—Who’sthatman?IsheMr.Brown?—ThatbeMr.Brown.Heneverwalksthisway.A.can’tB.mustn’tC.mustD.can19、(2010广西省桂林市34,1)—_____Iuseyourruler,Lingling?—Sure.Hereyouare.A.MayB.Would全品中考网C.NeedD.Must20、(2010四川达州21,1)—MustIfinishmyhomeworkrightnow?—No,you.A.needn’tB.maynotC.mustn’tD.can’t参考答案:1-5ABCCC6-10BDABB11-15BABAD16-20ADAAA