初中英语情态动词讲解

情态动词（-）情态动词的概念：情态动词表示说话人对某一动作或状态的态度。（二）情态动词的特点.情态动词有必然的词义。2.情态动词不能单独做谓语，它必需和其他动词的原形一路组成谓语。3.情态动词没有人称，数的转变。（三）情态动词的结构和意义L情态动词的大体句型确信句：主语+情态动词+动词原形+……否定句：主语+情态动词+not+动词原形+……疑问句：情态动词+主语+动词原形+…….情态动词的意义must“必需"；can/could“能，会”；may/might“能够”；should"应该”;would“愿，要"；haveto“不能不"；need“需要”（四）情态动词的大体用法l.can（could要紧指过去时刻）1）表示人或物本身所具有的能力，意为“能，能够，会”：Twoeyescanseemorethanone./Icanswimverywell.2）表示可能（理论上或是逻辑判定上）Hecan't（couldn't）haveenoughmoneyforanewcar.3）表示许诺：CanIhavealookatyournewpen?Heaskedwhetherhecouldtakethebookoutofthereading-room.4）表示对此刻动作或状态的猜想，要紧用于否定句和疑问句中或感叹句中：Hecan't（couldn't）beoversixty.他不可能超过六十岁。5）could表示比can更委婉客气的提出问题或陈述观点，指的是此刻时刻。Can（Could）youlendmeahand?帮我一把好吗？may（might）1）表许诺，询问或说明一件事可不能够做，might指过去时刻；但在疑问句中might也可指此刻时刻，语气比may更委婉。May（Might）Iaskforaphotoofyourbaby?我能够要一张你宝宝的照片吗？在回答以may引发的问句时，确信回答是一样可仍用may,或Yes,please./Certainly./Sure./Ofcourse.；否定回答依照说话人的语气由强到弱别离选用：mustnot（mustn't）（禁止）/hadbetterno（最好别）/maynot（不行）may表可能，但所表示的可能性不如can所表示的那样确信。might能够指过去时刻，也能够指此刻时刻，但语气加倍不确信。Hemaybeathome.他可能在家。Theymightbehavingameeting,butI’mnotsure.他们有可能在开会，不过我不肯定。must（haveto表示客观需要）1）表示“必需”（主观观点）时，用于确信句或疑问句；用于否定句时表示“禁止”。Wemustdoeverythingstepbystep.咱们一切都必需循序渐进地做。Youmustgethomebefore9：00.2）表示揣测。意为“想必、准是、必然”等，只用于确信句。Hemustbeill.Helookssopale.他准是病了。他的脸色苍白。3）must的疑问句，确信回答用must，否定回答用needn't或don'thaveto。should1）表责任或义务，意为“应该”，用于各类人称。Youshouldbepolitetoyourteachers.你对教师应该有礼貌。2）表推测，意为“想必必然、照说应该、估量”等。Thefilmshouldbeverygoodasitisstarringfirst-classactors.这部新电影是一流演员主演的，估量拍得专门好。5.will1）表意愿，用于各类人称。Iwilldoanythingforyou.我愿为你做任何事。2）will在疑问句顶用于第二人称，表示询问对方的意愿或向对方提出请求Willyouclosethewindow?请你把窗户关上好吗？6.would1）will的过去式，表示过去时刻的“意志、意愿”。Theywouldnotlethiminbecausehewaspoorlydressed.他们不让他进去因为他穿着破旧。IsaidIwoulddoanythingforyou.我说过我情愿为你做任何事。2）would用于此刻时刻，表示比较委婉地提出请求、建议或观点。Wouldyoulikeanotherglassofbeer?再来杯啤酒好吗？7.need1）need作为情态动词，要紧用于否定句疑问句；作为实义动词可用于确信句，否定句或疑问句中。Youneedn’ttelephonehimnow.你此刻没必要打电话给他。2）回答由need引发的问句时，确信回答一样用must，否定回答是用needn't--NeedIcome?--Yes,youmust.--我需要来吗？--需要。情态动词练习题（一）单项选择" Itakeitout?""I'msorry,you ."A.Could...couldn'tB.Might...mightnotC.Could...canD.May...can"Needwedothisjobnow?""Yes, ."A.youneedB.youshouldC.youmustD.youcan tohavelunchwithustoday?A.DoyoulikesB.WouldyoulikeC.WillyoulikedD.Haveyouliked-IsJohncomingbytrain?--Heshould,buthe not.Helikesdrivinghiscar.A.mustB.canC.needD.mayPeter comewithustonight,butheisn'tverysureyet.A.mustB.canC.mayD.willIthoughtyou behungry,soIhavebroughtyousomecakes.A.mayB.mightC.canD.couldComeon!We hurrybecausethereisn'tmuchtimeleft.A.mayB.mustC.canD.needAmydidbestintheEnglishtest.She hardlastweek.A.mustworkingB.shouldhaveworkedC.shouldworkD.mustwork—Wouldyouliketodrinksomejuice?—Thanks. ,butIhavedrunkalotiftea.A.I’dlovetoB.IthinksoC.I’mafraidnotD.Idon’tthinkso.—MayIsmokehere?—No,you !Look,thereisa“NOSMOKING”signhere.A.mayB.maynotC.needn’tD.mustn’t—Listen!Helenissinginginthenextroom.—It beHelen.ShehasgonetoBeijing.A.can’tB.mustn’tC.mayD.should—Whatdodriversdowhenthetrafficlightsturnred?—They stopandwaittillthegreenlight.A.mustB.canC.mayD.need（二）依照语境用适当的情态动词填空：1.“ Ileaveschoolnow?”“No,you cleantheclassroom.”t’stimeforclass.You stopplalyingfootball,oryou belateforschool..“ theyanswerthequeationinRussi