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情态动词用法小结1.情态动词不能表示正在发生或已经发生的事情,只表示期待或估计某事的发生。2.情态动词除ought和have外,后面只能接不带to的不定式。3.情态动词没有人称，数的变化，即情态动词第三人称单数不加-s。4.情态动词没有非谓语形式，即没有不定式、分词等形式。could与can的区别could与can都是情态动词,could是can的过去式。二者都可用于表示请求,但是用法稍有不同。can表示一般性的请求，语气随便,常用于熟人之间或长辈对晚辈,上级对下级的场合。e.g.Canyoutellusyourstory,Tony?Tony，你能给我们讲讲你的故事吗？could表示有礼貌的请求，语气委婉，常用于非熟人之间或晚辈对长辈，下级对上级的场合。比如：--CouldyoutellusifitsnowsinwinterinAustralia?--Sure.--请告诉我们,澳大利亚冬天下雪吗?--当然可以。注意：1.提出委婉的请求在回答中不可用could。A:CouldIhavethetelevisionon?B:Yes,youcan./No,youcan’t.2.在否定、疑问句中表示推测或怀疑用couldn’t。Hecouldn’tbeabadman.他不大可能是坏人。may和might表示允许或请求;表示没有把握的推测;may放在句首,表示祝愿。MayGodblessyou!Hemightbeathome.注意:might表示推测时,不表示时态，只是可能性比may小。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。haveto和mustMybrotherwasveryill,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.haveto有人称、数、时态的变化,而must只有一种形式。但must可用于间接引语中表示过去的必要或义务。Hehadtolookafterhissisteryesterday.3.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。用情态动词can/could,can’t,may,must,mustn’t,needn’t填空。1.-_____youcomeandplaywithusnow?-I’mafraidI_____.I_____dothecooking.I____comelater.2.-_____wecleanthewindowstoday?-No,you_______.You____cleanthemtomorrow.Couldcan’tmustcanMustneedn’tcan3.-____IwatchTVthisevening,mum?-No,you_______.Work_____comefirst.4.-____Icomein,please?-Yes,please.5.Excuseme.____youtellmethewaytothecinema?Maymustn’tmustCanCanA:Couldyouhelpme,please?B:___________!A:Iwantto________theseboxestomyhomeLet’s______theboxes_____thecarnow.B:_______right.A:Oh,thebox___heavy.Canyoucarryit?B:Yes,I______A:________you_____ittomyroom?B:Certainly.完成对话CertainlytakeputinAlliscanCouldtakeExercises•1Mypart-timejobistowashthe____(盘子)•2Canyou____(折叠)yourclothes？•3Jim,couldyouplease_________(整理你的床铺)•4Myhouseisn’tbig,soweoftenhavemealsinthe____(live)room5–Ihaveacold.Youarenearthewindow.____pleasecloseit?--OK.YoushouldlookafteryourselfACouldIBCanICCouldyouDCanyoudishesfoldmakeyourbedlivingC1“Tom,f____yourcoatandputitaway”Mothersaid2Couldyoupleases____thefloorandmakeitclean?3Idothed___aftermealseveryday4.Hes_____theflooryesterday.5Couldyouhelpmecleanthelivingroom?(作肯定回答和否定回答)_______,________________,___________6Mr.Wangwouldliketwo____toeatAdishBdishesCthedishDthedishes单项选择。1.--Couldyoupleasetakecareofmydog?--______.I’mtoobusy.A.Yes,youcanB.SureC.Sorry,Ican’tC2.--Couldyouplease____hisbed?--Certainly!A.makesB.makingC.make3.--CouldIuseyourcar?--______.A.Sure,youcanB.Sorry,youcanC.Sure,IcanCA4.Couldyouhelp_____?A.makingthebedB.makethebedC.madethebedB【运用】根据句意，用ill或sick填空。(1)Thedriversentthe_____babytothehospital.(2)Mybrotheris________.Ihavetolookafterhimathome.ill/sicksickI.根据句意及所给首字母提示，补全句中所缺单词。1.Hewasi___butnobodytookhimtothehospital.2.Ifyoudon’tstudyhard,yourgradeswilld______.3.IlikeOldHenrybecauseheoftenp_______uswithhotwater.llroprovides4.Wecand______onhimforhelp.5.Motherthinksplayingcomputergamesisaw______oftime.II.根据句意，用括号内所给单词的适当形式填空。1.He_________(develop)afarmfromnothing.2.Infact,youngpeoplehavetoomuch______(stress)today.wastedependdevelopedstress3.Hedidn’tmind________(help)mewithmyEnglish.4.Mr.LiandMr.Wangarebothmy_________(neighbor).5.Whydidthemanmakethelittleboy________(carry)water?carryhelpingneighbors选择填空。1.—Hedoesn’tlikethejobbecauseit’skindofdangerous.—____doI.(2012四川遂宁)A.EitherB.NeitherC.So2.____youpleasegivemeahand?Theboxistooheavy.(2013辽宁锦州)A.ShouldB.CouldC.MustD.Need根据汉语意思填空。1.Ihavetogotoschool_________(尽快)possible.2.Samdoesn’tlikeapples,_______(也不)doI.3.Hebrokehislegandhadtolie__________(一直).4.Theroomwasina______.(杂乱).5._____(折叠)theletterandputitinanenvelope.assoonasneitherallthetimemessTranslateandwritethemdown.1.请你替我开门，好吗？2.-请你洗餐具，好吗？-对不起，我不能，我得做作业。Couldyoupleaseopenthedoorforme?-Couldyoupleasedothedishes?-Sorry,Ican’t.Ihavetodomyhomework.3.你能倒一下垃圾吗？当然可以。Couldyoupleasetakeouttherubbish?Yes,sure./Ofcourse./Certainly.4.你能铺一下床和叠下衣服吗?不行啊，我明天有考试。Couldyoumakethebedandfoldtheclothes?Sorry,Ican’t.Ihaveatesttomorrow.常见的私人信件的开头方式：高兴：Iwassoglad/pleased/happytoreceiveyourletter.感谢：Thankyouforyourwonderfulgift/yourinterestingletter.关心与询问：Howareyouthesedays？/Howareyougettingonthesedays？/Howareyougettingonwithyourwork/studies？抱歉：IamsorrythatIdidnotwritetoyousoonerbutIhavebeenverybusythesedays.一般在表示道歉没有及时给对方写信时，还要简述原因或写上安慰的话。遗憾：Iwassorrytolearnthatyoudidnotdowellintheexamination./Iwassoupsettohearthatyouareillthesedays.Idohopeyouaregettingbetter.helpwithhouseworkandchoresathomehaveenoughstressfromschoolspendthetimeonschoolworkinorderto…Thereisnoneedforthemto…Itisimportantforsb.todosth.It’snotenoughto…developchildren’sindependenceThemore…,themore…