最新高中情態(tài)動詞用法詳解

PAGE14-情態(tài)動詞一、情態(tài)動詞的特點(diǎn):1.沒有人稱和數(shù)的變化。2.有些情態(tài)動詞有過去式的變化:e.g.will→would,can→could,may→might,

dare→dared二、情態(tài)動詞的否認(rèn)式:情態(tài)動詞+not+動詞原形cannot:can't,mustnot:mustn't,neednot:needn't三、情態(tài)動詞的用法及相互區(qū)別,是考試的內(nèi)容之一。1.can,beableto

beableto表示經(jīng)過努力后,能夠做到;beableto有多種形式的變化。can

1).表示體力或腦力方面的能力;2).表示允許、可能性。could是can的過去式,表示過去有能力及過去存在的可能性;用于疑問句表示委婉地提出問題。1)Thefirespreadthroughthehotelveryquicklybuteveryone____getout.

A.hadto

B.would

C.could

D.wasableto2)-Willyoustayforlunch?

-Sorry,__.Mybrotheriscomingtoseeme.A.Imustn't

B.Ican't

C.Ineedn't

D.Iwon't2.may表示詢問或說明一件事可不可做;表示某事有可能發(fā)生。might是may的過去式;用在疑問中比may委婉、客氣。1)-MayItakethisbookoutofthereading-room?-No,youmustn't.

(Yes,youmay.)2)-MightImakeasuggestion?

-Yes,youmay.3.must1).表示必須要做的事:必須2)表示很有把握的推斷:一定,準(zhǔn)是。have(has)to:have(has)gotto

必須,不得不。過去式:hadto3)-MustIgettothestationbeforethreeo'clock?-Yes,youmust.(No,youneedn't.)4)I'mafraidyouwillhavetowaitawhile.5)Shemustbeintheclassroomnow.6)Mary____beinParis,Isawherintownonlyafewminutesago.A.mustn't

B.shouldn't

C.can't

D.maynot4.shall

1)在疑問句中,用于第一、三人稱表示說話人征求對方的意見或向?qū)Ψ秸埱蟆?)用于二、三人稱,表示說話人給對方的命令、警告、允諾等概念。1)-ShallIplaceanorderwithyounow?-No,youneedn’t.-Shallheturndowntheradioabit?

-Yes,please.(No,pleasedon't.)2)YoushallhavetheEnglishbookassoonasIfinishit.3)Everythingthatheownsshallbetakenawayfromhim.4)Yourbrotherseldomcomestoseeyou,____?A.doeshe

B.doesn'the

C.willhe

D.isn'the5)It'safineday.Let'sgofishing,____?A.won'twe

B.willwe

C.don'twe

D.shallwe5.should

應(yīng)該;應(yīng)當(dāng)1)Youshouldlistentothedoctor'sadvice.2)Youshouldstudythearticlecarefully.6.will,would1)在疑問句中用于第二人稱,表示說話人向?qū)Ψ教岢稣埱蠡蛟儐枴Ｓ脀ould語氣更加婉轉(zhuǎn)。2)will表示現(xiàn)在的習(xí)慣性動作或狀態(tài);would表示過去的習(xí)慣性動作或狀態(tài)。3)will用于各種人稱,表示意志、意愿、決心、允諾;would表示過去時間的意志、意愿、。(1)Don'tsmokeinthemeetingroom,___you?

A.doyouB.willyou

C.canyou

D.couldyou-Willyoucomewithme?

-Yes,Iwill.(Iamsorry,Ican't.)(2)-Wouldyoutellussomethingaboutyourself?

-Yes,Iwill.(3)-It'smybirthdaytomorrow.Don'tforgettocometomyparty.-_____.A.Idon't

B.Iwon't

C.Ican't

D.Ihaven't7.oughtto

應(yīng)該;應(yīng)當(dāng)1)Yououghtn'ttosmoketoomuch.2)She____forwhatshehasdone.A.oughttopraise

B.oughtbepraisedC.oughttohavepraised

D.oughttobepraiseddaredaretocome

2.darecome1)Hedarenottellthetruth.2)Hedoesn'tdaretocomeoutatnight.3)Idon'tknowwhetherhe____try.A.dare

B.needs

C.wants

D.isallowed9.need

1).作為情態(tài)動詞:必須2).作為實(shí)義動詞:需要A.主語是人

need(todosomething;tobedonebysomebody)

B.主語是事物

need(doing;tobedone)1)-Dotheyneedtotakeanybookswiththem?-No,theydon'tneedto.2)-Needwebuyanynewequipment?

-No,weneedn't.3)Thisfarmtoolneedsrepairing.Thisfarmtoolneedstoberepaired.

4)-ShallItellJohnaboutit?

-No,you___.I'vetoldhimalready.A.needn't

B.wouldn't

C.mustn't

D.shouldn't5)It'safineday.You____takearaincoatwithyou.A.can't

B.mustn't

C.needn't

D.maynot情態(tài)動詞+不定式的完成式是高考的考試要點(diǎn)1.can(could)+have+過去分詞2.can't(couldn't)+have+過去分詞3.must+have+過去分詞4.may(might)+have+過去分詞5.needn't+have+過去分詞6.should(oughtto)+have+過去分詞7.shouldn't(oughtn'tto)+have+過去分詞1).Can(Could)theyhavecompletedtheirworksosoon?2)Shecan't(couldn't)havemakeamistake.3)Sincetheditchisfullofwater,it____(rain)lastnight.4)Hesaidthatshemighthavemisunderstoodhim.1情態(tài)動詞的語法特征1〕情態(tài)動詞不能表示正在發(fā)生或已經(jīng)發(fā)生的事情，只表示期待或估計(jì)某事的發(fā)生。2〕情態(tài)動詞除ought和have外，后面只能接不帶to的不定式。3〕情態(tài)動詞沒有人稱，數(shù)的變化，即情態(tài)動詞第三人稱單數(shù)不加-s。4〕情態(tài)動詞沒有非謂語形式，即沒有不定式，分詞，等形式。2比擬can和beableto1〕cancould表示能力；可能(過去時用could),只用于現(xiàn)在式和過去式(could)。beableto可以用于各種時態(tài)。Theywillbeabletotellyouthenewssoon.他很快就能告訴你消息了。2〕只用beabletoa.位于助動詞后。b.情態(tài)動詞后。c.表示過去某時刻動作時。d.用于句首表示條件。e.表示成功地做了某事時，只能用was/wereableto，不能用could。HewasabletofleeEuropebeforethewarbrokeout.=HemanagedtofleeEuropebeforethewarbrokeout.注意：could不表示時態(tài)1〕提出委婉的請求，〔注意在答復(fù)中不可用could〕。CouldIhavethetelevisionon?Yes,youcan./No,youcan't.2〕在否認(rèn)，疑問句中表示推測或疑心。Hecouldn'tbeabadman.他不大可能是壞人。3比擬may和might1〕表示允許或請求；表示沒有把握的推測；may放在句首，表示祝愿。MayGodblessyou!Hemightbeathome.注意：might表示推測時，不表示時態(tài)。只是可能性比may小。2〕成語：may/mightaswell，后面接不帶to的不定式，意為"不妨"。Ifthatisthecase,wemayaswelltry.典型例題Peter___comewithustonight,butheisn'tverysureyet.A.mustB.mayC.canD.will答案B.表可能性只能用may.此句意可從后半句推出。4比擬haveto和must1)兩詞都是'必須'的意思，haveto表示客觀的需要，must表示說話人主觀上的看法，既主觀上的必要。Mybrotherwasveryill,soIhadtocallthedoctorinthemiddleofthenight.我弟弟病得很厲害，我只得半夜里把醫(yī)生請來。(客觀上需要做這件事)Hesaidthattheymustworkhard.他說他們必須努力工作?！仓饔^上要做這件事〕2)haveto有人稱、數(shù)、時態(tài)的變化，而must只有一種形式。但must可用于間接引語中表示過去的必要或義務(wù)。Hehadtolookafterhissisteryesterday.3〕在否認(rèn)結(jié)構(gòu)中：don'thaveto表示"不必"mustn't表示"禁止"，Youdon'thavetotellhimaboutit.你不一定要把此事告訴他。Youmustn'ttellhimaboutit.你一定不要把這件事告訴他。5must表示推測1)must用在肯定句中表示較有把握的推測，意為"一定"。2)must表對現(xiàn)在的狀態(tài)或現(xiàn)在正發(fā)生的事情的推測時，must后面通常接系動詞be的原形或行為動詞的進(jìn)行式。Youhaveworkedhardallday.Youmustbetired.你辛苦干一整天，一定累了?！矊ΜF(xiàn)在情況的推測判斷〕Hemustbeworkinginhisoffice.他一定在辦公室工作呢。比擬：Hemustbestayingthere.他現(xiàn)在肯定呆在那里。Hemuststaythere.他必須呆在那。3)must表示對已發(fā)生的事情的推測時，must要接完成式。Ididn'thearthephone.Imusthavebeenasleep.我剛剛沒有聽到，我想必是睡著了。4)must表示對過去某時正發(fā)生的事情的推測，must后面要接不定式的完成進(jìn)行式。Whydidn'tyouanswermyphonecall?Well,Imusthavebeensleeping,soIdidn'thearit.5)否認(rèn)推測用can't。IfTomdidn'tleavehereuntilfiveo'clock,hecan'tbehomeyet.如果湯姆五點(diǎn)才離開這兒，他此時一定還未到家。6表示推測的用法can,could,may,might,must皆可表示推測，其用法如下：1〕情態(tài)動詞+動詞原形。表示對現(xiàn)在或?qū)淼那闆r的推測，此時動詞通常為系動詞。Idon'tknowwheresheis,shemaybeinWuhan.2〕情態(tài)動詞+動詞現(xiàn)在進(jìn)行時。表示對現(xiàn)在或?qū)碚谶M(jìn)行的情況進(jìn)行推測。Atthismoment,ourteachermustbecorrectingourexampapers.這時，我們老師想必在批改試卷。3〕情態(tài)動詞+動詞完成時。表示對過去情況的推測。WewouldhavefinishedthisworkbytheendofnextDecember.明年十二月底前我們很可能已完成這項(xiàng)工作了。Theroadiswet.Itmusthaverainedlastnight.地是濕的，昨天晚上一定下雨了。4〕情態(tài)動詞+動詞的現(xiàn)在完成進(jìn)行時。表示對過去正在發(fā)生事情的推測。Yourmothermusthavebeenlookingforyou.你媽媽一定一直在找你。5〕推測的否認(rèn)形式，疑問形式用can't,couldn't表示。Mikecan'thavefoundhiscar,forhecametoworkbybusthismorning.邁克一定還沒有找回他的車，因?yàn)樵缟纤亲财噥砩习嗟摹Ｗ⒁猓篶ould,might表示推測時不表示時態(tài)，其推測的程度不如can,may。7情態(tài)動詞+have+過去分詞1)may(might)have+donesth,can(could)have+donesth表示過去，推測過去時間里可能發(fā)生的事情。Philipmay(might)havebeenhurtseriouslyinthecaraccident.Philipcan(could)havebeenhurtseriouslyinthecaraccident.2)musthave+donesth，對過去時間里可能發(fā)生的事情的推測，語氣較強(qiáng)，具有"肯定"，"諒必"的意思。Lindahasgonetowork,butherbicycleisstillhere.Shemusthavegonebybus.3)oughttohavedonesth,shouldhavedonesth本應(yīng)該做某事，而事實(shí)上并沒有做。否認(rèn)句表示"不該做某事而做了"。Yououghtto(should)havebeenmorecarefulinthisexperiment.Heoughtnottohavethrowntheoldclothesaway.〔事實(shí)上已扔了。〕oughtto在語氣上比should要強(qiáng)。4)needn'thavedonesth本沒必要做某事Idressedverywarmlyforthetrip,butIneedn'thavedoneso.Theweatherwashot.5)wouldliketohavedonesth本打算做某事Iwouldliketohavereadthearticle,butIwasverybusythen.8should和oughttoshould和oughtto都為"應(yīng)該"的意思，可用于各種人稱。Oughthetogo?Yes.Ithinkheoughtto.表示要求，命令時，語氣由should〔應(yīng)該〕、hadbetter最好〕、must〔必須〕漸強(qiáng)。9hadbetter表示"最好"hadbetter相當(dāng)于一個助動詞，它只有一種形式，它后面要跟動詞原形。hadbetterdosthhadbetternotdosthItisprettycold.You'dbetterputonmycoat.She'dbetternotplaywiththedog.hadbetterhavedonesth表示與事實(shí)相反的結(jié)果，意為"本來最好"。Youhadbetterhavecomeearlier.10wouldrather表示"寧愿"wouldratherdowouldrathernotdowouldrather…than…寧愿……而不愿。還有wouldsooner,hadrather,hadsooner都表示"寧愿"、"寧可"的意思。IfIhaveachoice,Ihadsoonernotcontinuemystudiesatthisschool.Iwouldratherstayherethangohome.=Iwouldstayhereratherthangohome.典型例題Shallwegoskatingorstayathome?Which___do?A.doyouratherB.wouldyouratherC.willyouratherD.shouldyourather答案B。此題考查情態(tài)動詞rather的用法，wouldrather+dosth意為"寧愿"，此題為疑問句，would提前，所以選B。11will和would注意：1〕wouldlike；Wouldliketodo=wantto想要，為固定搭配。Wouldyouliketogowithme?2〕Willyou…?Wouldyoulike…?表示肯定含義的請求勸說時，疑問句中一般用some,而不是any。Wouldyoulikesomecake?3〕否認(rèn)結(jié)構(gòu)中用will，一般不用would,won'tyou是一種委婉語氣。Won'tyousitdown?12情態(tài)動詞的答復(fù)方式問句肯定答復(fù)否認(rèn)答復(fù)Needyou…?Yes,Imust.No,Ineedn'tMustyou…?/don'thaveto.典型例題1〕CouldIborrowyourdictionary?Yes,ofcourse,you____.A.mightB.willC.canD.should答案C.could表示委婉的語氣，并不為時態(tài)。答語中ofcourse，表示肯定的語氣，允許某人做某事時，用can和may來表達(dá)，不能用could或might。復(fù)習(xí)：will與you連用，用來提出要求或下命令。should與you連用，用來提出勸告。2〕ShallItellJohnaboutit?No,you___.I'vetoldhimalready.A.needn'tB.wouldn'tC.mustn'tD.shouldn't答案A。needn't不必，不用。wouldn't將不,不會的。mustn't禁止、不能。shouldn't不應(yīng)該。此題為不需要，不必的意思，應(yīng)用needn't。3〕Don'tforgettocometomybirthdaypartytomorrow.______.A.Idon'tB.Iwon'tC.Ican'tD.Ihaven't答案B.will既可當(dāng)作情態(tài)動詞，表請求、建議、也可作為實(shí)義動詞表"意愿、意志、決心"，此題表示決心，選B。13帶to的情態(tài)動詞帶to的情態(tài)動詞有四個：oughtto,haveto,usedto,beto,如加上havegotto,(=must),beableto，為六個。它們的疑問，否認(rèn)形式應(yīng)予以注意：Dotheyhavetopaytheirbillbeforetheendofthemonth?Shedidn'tusetoplaytennisbeforeshewasfourteen.Yououghtnottohavetoldherallaboutit.Oughthetoseeaheartspecialistatonce.?oughtto本身作為情態(tài)動詞使用。其他的詞作為實(shí)義動詞使用，變疑問，否認(rèn)時，須有do等助動詞協(xié)助。典型例題Tomoughtnotto___meyoursecret,buthemeantnoharm.A.havetoldB.tellC.betellingD.havingtold答案A。由于后句為過去時，告訴秘密的動作又發(fā)生在其前因，此地應(yīng)用過去完成時，但它在情態(tài)動詞oughtto后，所以用have。14比擬need和dare這兩詞既可做實(shí)義動詞用，又可做情態(tài)動詞用。作為情態(tài)動詞，兩者都只能用于疑問句，否認(rèn)句和條件句。need作實(shí)義動詞時后面的不定式必須帶to，而dare作實(shí)義動詞用時,后面的to時常可以被省略。1)實(shí)義動詞：need〔需要,要求〕need+n./todosth2)情態(tài)動詞：need，只用原形need后加do，否認(rèn)形式為neednot。Needyougoyet?Yes,Imust./No,Ineedn't.3)need的被動含義：need,want,require,worth〔形容詞〕后面接doing也可以表示被動：needdoing=needtobedone練習(xí).情態(tài)動詞1.Shepassedmeinthestreetwithoutspeaking,she____me.A.can'tsee

B.can'thaveseenC.shouldn'thaveseen

D.shouldn'tsee2.-Theywerealreadyfivepeopleinthecarbuttheymanagedtotakemeaswell.-It___acomfortablejourney.A.can'tbe

B.shouldn'tbeC.mustn'thavebeen

D.couldn'thavebeen3.He____youmorehelpeventhoughhewasverybusy.A.mighthavegiven

B.mightgiveC.mayhavegiven

D.maygive4.Shequickenedherpaceinorderthatshe____withtheothers.A.maycatchup

B.mightcatchupC.couldhavecaughtup

D.mighthavecaughtup5.Therewasplentyoftime,she____.A.mustn'thavehurried

B.couldn'thavehurriedC.mustnothurry

D.needn'thavehurried6.Ididn'thearthephone,I____asleep.A.mustbe

B.musthavebeen

C.shouldbe

D.shouldhavebeen7.Hewasagoodrunnersohe____escapefromthepolice.A.might

B.succeeded

C.would

D.wasableto8.We____lastnight,butwewenttotheconcertinstead.A.musthavestudied

B.mightstudyC.shouldhavestudied

D.wouldstudy9.Theyoungmanhasmadesomuchnoisethathe____nothavebeenallowedtoattendtheconcert.A.could

B.must

C.wouldD.should10.Asolidergothimoutofdanger.He____hurt.A.maynot

B.canhavegot

C.mighthavegot

D.mightget11.-CouldIuseyourpen?

-Yes,ofcourseyou____.A.must

B.could

C.canD.might12.Johnny,you___playwiththeknife,you__hurtyourself.A.won't;can't

B.mustn't;may

C.shouldn't;must

D.can't;shouldn't13.Sir,you___besittinginthiswaitingroom.Itisforthiswomanandchildrenonly.A.oughtn'tto

B.can't

C.won't

D.needn't14.I____tellherthetruth.A.cannothelp

B.can'tbut

C.maynothelp

D.couldbut15.Ihaveneitheraraincoatnoranumbrella.That'swhyI____waituntiltherainstops.A.must

B.should

C.oughtto

D.haveto16.Atrafficaccidenthappenedyesterdayandadriver____.A.mayhurt

B.maybehurtingC.mayhavebeenhurt

D.maybehurt17.Adograninfrontofmymother'scarandshe____stopveryquickly.A.oughtto

B.hadbetter

C.must

D.hadto18.-IstayedatahotelwhileinNewYork.

-Oh,didyou?You____withBarbara.A.couldhavestayed

B.couldstayC.wouldstay

D.musthavestayed19.Theplantisdead.I___itmorewater.A.willgive

B.wouldhavegivenC.mustgive

D.shouldhavegiven20.Acomputer___thinkforitself;itmustbetoldwhattodo.A.can't

B.couldn't

C.maynot

D.mightnot

21.It'snearlyseveno'clock.Jack___behereatanymoment.A.must

B.need

C.shouldD.can22.Tomoughtnotto___meyoursecret,buthemeantnoharm.A.havetold

B.tell

C.betelling

D.havingtold23.-Alice,youfeedthebirdtoday,____?-ButIfedityesterday.A.doyou

B.willyou

C.didn'tyou

D.don'tyou24.-DoyouthinkIcouldborrowyourdictionary?

-____.A.Yes,youmayborrow

B.Yes,youcouldC.Yes,helpyourself

D.Yes,goon25.Iwasreallyanxiousaboutyou.You____homewithoutaword.A.mustn'tleave

B.shouldn'thaveleftC.couldn'thaveleft

D.needn'tleaveKey:1-5BDABD

6-10BDCDC

11-15CBABD

16-20CDADA

21-25CAACB全國各省市高考試卷中的情態(tài)動詞試題1A(全國卷I〕24.There'snolighton--they______beathome.

A.can't

B.mustn't

C.needn'tD.shouldn't2(全國卷2)10.Wehopethatasmanypeopleas-possible_______joinusforthepicnictomorrow.A.needB.mustC.should

D.can3(北京卷)25.--What'sthename?--Khulaifi._______Ispellthatforyou?A.Shall

B.Would

C.CanD.Might4(上海春)26.Youknowheisnotgoingtoletusleaveearlyifwe___gettheworkdone.A.can't

B.maynot

C.shouldn'tD.mustn't5(天津卷)11.Wehaveprovedgreatadventurers,butwehavedonethegreatestmarchevermadeinthepasttenyears.A.needn't

B.maynot

C.shouldn’tD.mustn't6(四川卷)32.IsJackondutytoday?It________behim.It'shisturntomorrow.A.mustn't

B.won't

C.can't

D.needn't7(江西卷)24．Theweatherturnedouttobefineyesterday．I_______thetroubletocarrymyumbrellawithme．A．shouldhavetaken

B．couldhavetaken

C．needn'thavetaken

D.mustn'thavetaken8(陜西卷)19.Asyouworkedlateyesterday,you_________havecomethismorning.A.mayn't

B.can't

C.mustn't

D.needn't9(福建卷)27.Ifitwerenotforthefactthatshe_______sing,Iwouldinvitehertotheparty.A.couldn't

B.shouldn't

C.can't

D.mightnot10(湖北卷)31.__________fired,yourhealthcareandotherbenefitswillnotbeimmediatelycutoff.A.Wouldyoube

B.Shouldyoube

C.Couldyoube

D.Mightyoube11(湖南卷)32.Someaspectsofapilot'sjob________beboring,andpilotsoften_______workatinconvenienthours.A.can;haveto

B.may;can

C.haveto;may

D.oughtto;must12(江蘇卷)21.IthinkI'llgiveBobaring.You_______.Youhaven'tbeenintouchwithhimforages.A.willB.mayC.havetoD.should13(廣東卷)22.--Musthecometosignthispaperhimself?

--Yes,he___.A.need

B.must

C.may

D.will14(浙江卷)19.CouldIhaveawordwithyou,mum?Ohdear,ifyou________.A.canB.mustC.mayD.should15(山東卷)30.--MayIsmokehere?--Ifyou____,chooseaseatinthesmokingsection.A.should

B.could

C.may

D.mustKeys:1-10ADCABCCDCB11-15ADBBD本資料來源于?七彩教育高考英語陷阱題總結(jié)歸納——情態(tài)動詞◆典型陷阱題分析◆

1.“Mikeisoftenabsentfromclass.〞“Tellhimhe_____answerforitifhegoesonbehavinglikethat.〞

A.shall

B.will

C.would

D.can【陷阱】幾個干擾項(xiàng)均有可能誤選?！痉治觥孔钫_答案選A.shall用作情態(tài)動詞主要有以下兩個用法：〔1〕用于疑問句中征求意見。如：

ShallIhelpyou？要不要我?guī)蛶湍悖?/p>

ShallIopenthewindow？要我把窗子翻開嗎？〔2〕用于陳述句中表示允諾、告誡、警告、威脅、命令、規(guī)定、必然性等〔可用于各類人稱〕。如：

Youshallsufferforthis.你會為此事吃苦頭的。〔表威脅〕

Eachcompetitorshallwearanumber.每個參賽者要戴一個號碼。〔表規(guī)定〕

Youshallheareverythingassoonasyoucome.你一來就可聽到所有情況了。〔表允諾〕請做以下試題〔答案均選shall〕：〔1〕“Ipromisethatshe_____getanicepresentonherbirthday.〞“Willitbeagreatsurprisetoher？〞

A.should

B.must

C.would

D.shall

2.You_______paytoomuchattentiontoyourreadingskill,asitissoimportant.

A.cannot

B.shouldn’t

C.mustn’t

D.needn’t【陷阱】幾個干擾項(xiàng)均有可能誤選?！痉治觥孔钫_答案選A.cannot…too…是英語中一個十分有用的表達(dá)，意為“不可能太……，無論怎樣……也不算過分，越……越……〞。如：

Youcan’tbetoocareful.你越仔細(xì)越好。

Youcan’tpraisethetoomuch.這本書值得大加贊揚(yáng)。

Wecannotworktoomuchforthepeople.我們?yōu)槿嗣褡龉ぷ魇遣豢赡茏鲞^頭的。

Awomancannothavetoomanyclothes.女人買的衣服再多也不算多。注：有時也可用cannever,impossible等與too連用來表示類似意思。如：

Itisimpossibletogettheretoosoon.去那兒越早越好。3.“IsJohncomingbytrain？〞“Heshould,buthe_____not.Helikesdrivinghiscar.〞

A.must

B.can

C.need

D.may【陷阱】可能誤選B或C.【分析】最正確答案為D.may表推測，maynot意為“可能不〔會坐火車來〕〞。句中的Heshould為Heshouldcomebytrain之省略，由于其后出現(xiàn)轉(zhuǎn)折連詞but，說明語意有變化，再結(jié)合下文的Helikesdrivinghiscar，便可決定此題選D.注意，不能選B，因?yàn)閏an表示推測時通常不用肯定陳述句。

4.“Iheardtheywentskiinginthemountainslastwinter.〞“It____truebecausetherewaslittlesnowthere.〞

A.maynotbe

B.won’tbe

C.couldn’tbe

D.mustn’tbe【陷阱】幾個干擾項(xiàng)均有可能誤選?！痉治觥看祟}最正確答案為C，主要由下文的becausetherewaslittlesnowthere這一語境所決定，既然“沒下什么雪〞，那么“滑雪〞就應(yīng)是“不可能〞，所以選couldn’tbe，即選C.

5.“Doyouthinkheislazy？〞“I_____soonce,butIdon’tnow.〞

A.mayhavethought

B.canhavethought

C.maythink

D.mightthink答案選A.從答話人的語境可知，空格處的意思“曾經(jīng)這樣想過〞，即對過去情況作推測，故應(yīng)用“情態(tài)動詞+動詞完成式〞；又因?yàn)閏an表推測不用于肯定句，應(yīng)選A.請看類例：

Theiranswersareexactlythesame—oneofthem______fromtheother.

A.mustcopy

B.musthavecopied

C.shouldcopy

D.shouldhavecopied答案選B，既然兩人的答案完全一樣，說明“抄襲〞已經(jīng)發(fā)生，故用“情態(tài)動詞+動詞完成式〞，根據(jù)句意，應(yīng)選B而不能選D.

6.You_____beright,butIdon’tthinkyouare.

A.can

B.could

C.must

D.should【陷阱】幾個干擾項(xiàng)均有可能誤選?！痉治觥繌恼Z境上看，C、D不宜選，在剩下的A和B中，許多同學(xué)想當(dāng)然地選了A，認(rèn)為整個句子為現(xiàn)在時態(tài)，所以選can，而不選過去式could，但是最正確答案卻是B而不是A.按照英語語法，情態(tài)動詞can用于推測表示可能性時，通常只用于否認(rèn)句或疑問句中，而不用于肯定句中；但could用于表推測時，卻不僅可用于否認(rèn)句和疑問句，也可用于肯定句，且此時的could并不是can的過去式，與can也沒有時間上的差異，只是could比can語氣更委婉，所以答案選B.注：can在以下特殊情況下，也可用于肯定句。一是表示抽象的可能性，即從理論上或邏輯上分析是可能的，但是實(shí)際上未必會發(fā)生。如：Anyonecanmakemistakes.任何人都可能會犯錯誤。二是后接“be〔get,seem,become〕＋形容詞〞，表示“有時會〞、“時常會〞等。如：Myfathercanbeveryunreasonable.我父親有時候很不講道理。◆精編陷阱題訓(xùn)練◆

1.“Ithoughtyouwouldn’tmind.〞“Well,asamatteroffactIdon’t,butyou_____mefirst.〞

A.shouldask

B.shouldhaveasked

C.mustask

D.musthaveasked

2.“Icalledyouyesterday.Awomananswered,butIdidn’trecognizehervoice.〞“Oh,it_____myauntJean.〞

A.mustbe

B.musthavebeen

C.mightbe

D.canhavebeen

3.Thatcarnearlyhitme;I______.

A.mightbekilled

B.mighthavebeenkilled

C.maybekilled

D.maybeenkilled

4.It’saverykindoffer,butIreally_____acceptit.

A.mustn’t

B.needn’t

C.can’t

D.don’t

5.Thepolicestillhaven’tfoundher,butthey’redoingallthey_____.

A.may

B.can

C.must

D.will

6.You_____practisethedrumswhilethebabyissleeping.

A.needn’t

B.mightn’t

C.mustn’t

D.won’t

7.You_____himthenews;heknewitalready.

A.needn’ttell

B.needn’thavetold

C.mightn’ttell

D.mightn’thavetold

8.Asshe’snothere,Isupposeshe_____home.

A.mustgo

B.musthavegone

C.mightgo

D.mightbegoing

9.Areyoustillhere？You______homehoursago.

A.shouldgo

B.shouldhavegone

C.mightgo

D.mayhavegone10.“Icalledyouyesterday.Awomananswered,butIdidn’trecognizehervoice.〞“Oh,it_____myauntJean.〞

A.mustbe

B.musthavebeen

C.mightbe

D.canhavebeen

11.I_______havemethimalongtimeago.Bothhisnameandfaceareveryfamiliar.

A.may

B.can

C.would

D.should

13.“Shallwegoshopping？〞“Sorry,we_______buyanythingnowbecausenoneoftheshopsareopen.〞

A.mustn’t

B.needn’t

C.can’t

D.shouldn’t

14.Theyoftengototherestaurantsformeals.They_____beverypoor.

A.mustn’t

B.can’t

C.maynot

D.needn’t

15.Ididn’tseeherinthemeetingroomthismorning.She______havespokenatthemeeting.

A.mustn’t

B.shouldn’t

C.needn’t

D.couldn’t

17.He______thetestagain,inwhichcase,hismotherwillbeverydisappointed.

A.mightfail

B.musthavefailed

C.shouldfail

D.couldhavefailed

18.“Whydidn’tshecometothemeetingyesterday？〞“I’mnotsosure.She______ill.〞

A.shouldbe

B.shouldhavebeen

C.mustbe

D.mighthavebeen19.Whydidyoujustsitandwatch？You_______me.

A.couldhelp

B.shouldhelp

C.couldhavehelped

D.musthavehelped

20.“You______y