九年级英语情态动词总复习.doc

情态动词湖北省咸宁市通城县关刀中学卢翠松一情态动词的语法特征情态动词本身虽有词义但只表示说话人的看法命令准许等不能单独作谓语须与实义动词构成谓语1情态动词除oughttohavetousedto外其它情态动词后面只能接不带to的不定式2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二一些容易混淆的用法1比较can和beabletocancould表示能力bornabilitylearnedability只用于现在式和过去式couldcould不表示时态提出委婉的请求注意在回答中不可用could4545CouldIhavethetelevisionon4545YesyoucanNoyoucant表示经过努力或在一定条件下设法成功地做了某事时而非能力只能用waswereableto不能用couldmanagedtodosthsucceededindoingsthHewasabletofleeEuropebeforethewarbrokeout2比较haveto和musthaveto有人称数时态的变化而must只有一种形式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MybrotherwasveryillsoIhadtocallthedoctorinthemiddleofthenightIwanttotakemoreexercisesoImustwalktoschooleverydaymust问句的回答egMustIwaituntiltheycome4545Yesyoumust4545Noyouneedntdonthavetodontneedto在否定结构中donthaveto表示不必mustnt表示禁止不允许带有很强的语气egYoudonthavetotellhimaboutit你不一定要把此事告诉他3cancould和maymightcan和may都可表示请求或给与许可Can语气一般couldmay比较礼貌常用对于cancould的回答一般是cancant不可用could而对may的回答则是maymaynot454545CouldIuseyourlegtop454545YesofcourseyoucanSorryIamafraidyoucant4545MayIleavetheclassroom4545YesyoumayNoyoumustntyoumaynotyoudonthaveto4oughttoshould表示义务责任都为应该的意思可用于各种人称表示要求命令时语气由should应该hadbetter最好must必须渐强4545Oughthetogo4545YesIthinkheoughtto5shallwillshall用于疑问句第一三人称表示愿意效劳以征求同意或提出建议征询意见ShallIcarrytheluggageforyouMissLi用于第二三人称陈述句中可表示说话人给对方的命令承诺警告或恐吓等Nothingshallstopusfromdoinggoodwill表示主语的愿意决心承诺IfyouwilllistentomeIwillhelpyou表示物体的属性或人或动物的习性OilwillfloatonwaterFishwilldieoutofwater6usedtowould1都可表示过去习惯但usedto强调过去经常或习惯于做某事但现在已不做了强调与现在的对比而would单纯就表示过去的习惯行为PollutionisstillaproblembutitusedtobeworseSometimesshewouldbringmesomesmallpresentswhenshewasinagoodmood2usedto的否定形式是usednttododidntusetodoThereusedtobeatalltreehereusedntheredidntthere三情态动词cancouldmaymightmust表示推测的用法其用法如下1Cancould用于疑问句表示猜测可能could一般不表示时态只表达委婉语气cantcouldnt表示不可能couldnt一般不表示时态只表达委婉语气但在过去时态的宾语从句只能用couldntIbelievehimHecantesuchanirresponsiblemanIthoughtyoucouldnthavemetheryesterday2maymightmaymight用于肯定句表示没有把握的推测might表示推测时不表示时态只是可能性比may小但在过去时态的宾语从句只能用mightHemightbeathomePhilipmaymighthavebeenhurtseriouslyinthecaraccident3must用在肯定句中表示较有把握的推测意为一定YouhaveworkedhardalldayYoumustbetired4这些表示推测的情态动词使用时的时态构成1情态动词动词原形表示对现在或将来的情况的推测此时动词通常为系动词IdontknowwheresheisshemaybeinWuhan2情态动词动词现在进行时表示对正在进行的情况进行推测Atthismomentourteachermustbecorrectingourexampapers3情态动词动词完成时表示对过去情况的推测TheroadiswetItmusthaverainedlastnight4情态动词动词的现在完成进行时表示对过去正在发生事情或一个完成进行的动作的推测Yourmothermusthavebeenlookingforyou四特殊用法1need作实义动词HeneedstotakearestHeneedssometimetothinkitoverTherecorderneedsrepairingtoberepairedneednthavedonesth本没必要做某事但实际做了IdressedverywarmlyforthetripbutIneednthavedonesoTheweatherwashot2may放在句首表示祝愿MaytheworldbefullofloveMayGodblessyou3can的惯用语canbutdo只好Wecanbutdoourbest我们只好尽全力了cannotchoosehelpbutdo不得不Icanthelpbutadmireyourcouragecanthelpdoing不禁Icanthelplikingherthoughshecanbeannoyingsometimescanttoo无论也不过分越越好Wecantbetoocarefulwhiledrivingasasonecan454545asaspossible1SorryImlateIhaveturnedoffthealarmclockandgonebacktosleepagainAmightBshouldCcanDwill2MysistermethimattheGrandTheateryesterdayafternoonsoheyourlectureAcouldnthaveattendedBneednthaveattendedCmustnthaveattendedDshouldnthaveattended3JackyetotherwisehewouldhavetelephonedmeAmusnthavearrivedBshouldnthavearrivedCcanthavearrivedDneednothavearrived4IwasreallyanxiousaboutyouYouhomewithoutawordAmustntleaveBshouldnthaveleftCcouldnthaveleftDneedntleave5ItoldSallyhowtogetherebutperhapsIforherAhadtowriteitoutBmusthavewrittenitoutCshouldhavewrittenitoutDoughttowriteitout6IsJohncomingbytrain454545HeshouldbuthenotHelikesdrivinghiscarAmustBcanCneedDmay7IhearyouvegotasetofvaluableAustraliancoinsIhavealookYescertainlyADoBMayCShallDShould8MrBushisontimeforeverythingHowitbethathewaslatefortheopeningceremonyAcanBshouldCmayDmust9AreyoucomingtoJeffsparty45454545ImnotsureIgototheconcertinsteadAmustBwouldCshouldDmight10IshouldhavebeentherebutInotfindthetimeAwouldBcouldCmightDshould11JohnnyyouplaywiththeknifeyouhurtyourselfAwontcantBmustntmayCshouldntmustDcantshouldnt12Willyoustayforlunch454545SorryMybrotheriscomingtoseemeAImustntBIcantCIneedntDIwont13CouldIborrowyourdictionary45454545YesofcourseyouAmightBwillCcanDshould14WhencanIcomeforthephotosIneedthemtomorrowafternoonTheybereadyby1200AcanBshouldCmightDneed15ThefirespreadthroughthehotelveryquicklybuteveryonegetoutAhadtoBwouldCcouldDwasableto16ShallItellJohnaboutit454545NoyouIvetoldhimalreadyAneedntBwouldntCmustntDshouldnt17YoumustjustaswelltellthemanufacturerthatmalecustomersnottakethedesignofthefurnitureAmustBshallCmayDneed18454545IsntthatAnnshusbandoverthere454545Noitbehim4545ImsurehedoesntwearglassesAcantBmustnotCwontDmaynot19454545Whoisthegirlstandingoverthere454545WellifyouknowhernameisMabelAmayBcanCmustDshall20Childrenunder12yearsofageinthatcountrybeunderadultsupervisionwheninpubliclibraryAmustBmayCcanDneed21TheinterestbedividedintofivepartsaccordingtotheagreementmadebybothsidesdeclaredthejudgeAmayBshouldCmustDshall224545Therewerealreadyfivepeopleinthecarbuttheymanagedtotakemeaswell4545ItacomfortablejourneyAcantbeBshouldntbeCmustnthavebeenDcouldnthavebeen234545IsJohncomingbytrain4545HeshouldbuthenotHelikesdrivinghiscarAmustBcanCneedDmay24IwishtogohomenowIAmayBcantCmustDdo25HemusthavefinishedhishomeworkforalongtimeheAmustntBdidntCneedntDhasnt26AwisemansometimesmakeamistakeAmayBmustCwouldDcan27454545healready454545HeforheisalwaysingoodmannerACouldhaveleftcanthaveleftBCouldhaveleftcouldnthaveleftCMayhaveleftmaynothaveleftDMusthaveleftneednthaveleft28ItalkedforalongtimeandintheendImakeherbelievemeAcouldBcanCmustDwasableto29HowtherebesuchathingAmayBcanCmustDwill30454545WhatdoyouthinkofthefoodhereOhwonderfulWeabetterplaceAwontfindBmustnthavefoundCcantfindDcouldnthavefound31IsitupallnightandthatwasharmfultomyhealthAshouldBusedtoCwasusedtoDgotusedto32ThereaninnatthefootofthehillAusedtobeBusedtohaveCwouldbeDgotusedtohaving33HehavethebookwhenIfinishreadingitAwillBshallCmustDought34ItisstrangethathesaysoAshallBwillCshouldDought35HisadvicenotbetakenAwasneededBneedsCneedDisneeded36BequietpleaseorhisvoicebeheardAcantBmustntCisntabletoDmaynot37WhyyoualwaysinterruptmeAcanBwillCmayDmust38WeforherbecauseshenevercameAneedntwaitBshouldnthavewaitedCmustntwaitDmustnthavewaited39454545Pleasedontmakeanoise454545IllbeasquietasamouseAYesIwontBNoIwontCNoIwillDYesIwill40IfhelistentomeIllbeabletohelphimAwillBshallC不填Dshould41IfyourchildrendoasItellyouyougotothepartyAwontshantB不填willCdontwontDmustshall424545Willyouopenthedoorplease454545AWillIwhatBShallIwhatCWhatshallIDWhatcanI43HewentonfootbuthebybusAshouldgoneBcouldhavegoneCoughthavegoneDcouldbegone44MandiewithoutairorwaterAwillBshallCshouldDwould45HeyoumorehelpeventhoughhewasverybusyAmighthavegivenBmightgiveCmayhavegivenDmaygive14545455AACB6454510DBADB1115BBCBD1620ACACA2125DDDAD2630AADBD3135BABCC3640ADBBA4145ABBAA