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高考英語(yǔ)情態(tài)動(dòng)詞用法詳解,想要滿分的看過(guò)來(lái)情態(tài)動(dòng)詞的區(qū)分情態(tài)動(dòng)詞可以廣泛分為四大類。第一類只能做情態(tài)動(dòng)詞,包括may、might、must等。第二類既能做情態(tài)動(dòng)詞,又能做實(shí)義助詞,包括need、dare、can等。第三類既能做情態(tài)動(dòng)詞,又能做助動(dòng)詞,包括shall、should、will、would等。第四類是指具有情態(tài)動(dòng)詞特征的短語(yǔ),包括haveto、usedto、oughtto等。Can/could通常代表許可的意思,能夠廣泛用于肯定句、否定句和疑問(wèn)句中,而且could的表達(dá)效果通常要更加委婉。Cannot是指“禁止”,通常用于警告和告示。May/might的意思與can/could相似,用法也沒(méi)有明顯區(qū)別,不過(guò)其與后者相比大多用于正式文體,通常含有尊敬之意,其中,might較may表達(dá)的效果更加委婉,但不是很常用。Shall通常用于表示征求意見(jiàn),常用于疑問(wèn)句中。而will/would同樣是表示請(qǐng)求,其中would的表達(dá)效果更為客氣委婉,且大多用于第二人稱。Must則是表示必須、必要。情態(tài)動(dòng)詞的用法重點(diǎn)學(xué)習(xí):will(would),can(could),may(might)。will1?客觀情形主語(yǔ)自己不能做決定,不要受客觀情形支配。如Iwillbe18yearsoldnextmonth.下個(gè)月我就要18歲了。這里的will和將來(lái)時(shí)態(tài)連用表明是受時(shí)間客觀規(guī)律支配的,不以主觀意志來(lái)做主的。因此可以和一個(gè)詞組begoingtodo區(qū)別開(kāi)來(lái)。begoingtodo也是將要的意思,用法和will有很大區(qū)別。當(dāng)begoingtodo的主語(yǔ)是人的時(shí)候,意思為“打算,計(jì)劃”;只有當(dāng)其主語(yǔ)是物的時(shí)候才可以和will等同表示馬上要發(fā)生,但是依然不可以用于表示自然規(guī)律的情形。Itisgoingtorainsoon.=Itwillrainsoon.馬上就要下雨了。Ifheatedup,icewillturnintowater.如果加熱,冰就會(huì)變成水。這是自然現(xiàn)象和規(guī)律。不可以使用begoingto。自己不能做主,需要爭(zhēng)求意見(jiàn)的時(shí)候 問(wèn)詢別人是否需要本人提供的幫助時(shí)。如WillIcooknoodlesforyou?我給你煮點(diǎn)面吃好嗎?2.主觀態(tài)度(1)表意愿。W訂lyoumarryme?你愿意嫁給我嗎?Yes,Iwill.我愿意。will的名詞意思是意志,意愿,和遺囑。Atwill隨心所欲,想怎么樣就怎么樣。willing就是派生出來(lái)的形容詞,bewillingtodo=bereadytodo樂(lè)意去做。(2)主觀判斷,表示非??隙ǖ呐袛嗪驼J(rèn)同Boyswillbeboys.男孩子畢竟是男孩子。Masterwillbemaster.大師就是大師。(3)表示對(duì)能力的估計(jì)Havingenoughmoney,Iwilltravelaroundtheworld.如果有錢(qián)了,我就可以周游世界了。(4)希望和請(qǐng)求WillyouturndowntheTVvolumealittlebit?你把電視音量調(diào)小點(diǎn)好嗎?一般來(lái)說(shuō),用will原形的時(shí)候多用于熟人朋友間,和第一次見(jiàn)面的人說(shuō)話,要注意禮貌,因此wouldyouturndowntheTVvolumealittle更合適。can1.客觀情形A.主語(yǔ)自己不能做決定,不要受客觀情形支配。Bytheendofnextmonth,wecanhavelearned2000words.到下個(gè)月底的時(shí)候,我們就會(huì)學(xué)完2000個(gè)詞匯了。這里的can和will都可以表示受時(shí)間的支配。Watercanturnintoicewhenfrozen.水如果冰凍就會(huì)結(jié)冰。自然規(guī)律和will一樣可以替換。B.自己不能做主,需要爭(zhēng)求意見(jiàn)的時(shí)候一一問(wèn)詢別人是否允許自己是否可以做什么的時(shí)候。CanIuseyourphone?我可以用一下你的手機(jī)嗎?Yes,youcan.當(dāng)然可以。No,youcan't.你不能(你不被允許)。此時(shí)也可以用may來(lái)替換。MayIuseyourphone?我可以用一下你的手機(jī)嗎?Yes,youcan.當(dāng)然可以(注意回答的時(shí)候用can居多),No,youcan't.此時(shí)不可以回答maynot.2.主觀態(tài)度(1)意愿。Icanhelpyouifyougiveme100dollars.如果你給我100元,我就愿意幫助你了。但是這是屬于非正式的用法,如果正式場(chǎng)合問(wèn)詢別人意愿的時(shí)候還是應(yīng)該選擇will.(2)主觀判斷,猜測(cè)。A.把握并非很足的判斷相當(dāng)于may。Thisupcomingexamcanbedifficult,fortheteachergivesusanextrareviewclassonit.馬上到來(lái)的考試可能會(huì)很難,因?yàn)槔蠋煘榱丝荚嚱o我們加了額外的復(fù)習(xí)課。此處可以用may取代。B.用于may和must表示猜測(cè)時(shí)候的否定。(3)表示對(duì)能力的估計(jì)。這種能力往往都是先天獲得的,或者已經(jīng)具備很久的。而beableto表示能力的時(shí)候,一般是可以用于具體時(shí)態(tài)中,而can只有一般時(shí)和過(guò)去時(shí),而且不和具體時(shí)間狀語(yǔ)連用。IcansingquiteafewEnglishsongs.我可以唱好多英語(yǔ)過(guò)去。表示的含義是我學(xué)過(guò)很多英語(yǔ)歌曲,任何時(shí)候都可以唱出來(lái)。ThecandidatesareabletohavethechancetomeettheHRmanagerafterwinningthefirstinterview.在初次面試成功后,求職者能夠有機(jī)會(huì)和人力資源的經(jīng)理見(jiàn)面。此時(shí)Beableto用于具體時(shí)刻前。could希望和請(qǐng)求和will一樣,和熟人用can,和陌生人用could更禮貌。Canyougivemeahand?你可以幫助我一下嗎?Couldyoupleasegivemeahand?您可以幫助我一下嗎?(更客氣)may1?客觀情形主語(yǔ)自己不能做決定,不要受客觀情形支配。MayIcomein?我可以進(jìn)來(lái)嗎?No,youcan't.否定形式只可以是can't,不可以是maynot.這是因?yàn)椋焊鶕?jù)詞源學(xué)(etymology)may來(lái)自于might(權(quán)力,權(quán)威,威嚴(yán))。maynot的意思有兩個(gè):1.權(quán)威迫使下,不能做……2.表示猜測(cè),表示不可能。2?主觀態(tài)度。A.把握并非很足的判斷。Itmaynotbehisfault.這也許不是他的錯(cuò)。B.嚴(yán)格禁止。maynotdo=mustn'tdo=shouldn'tdoStudentsmustn't/maynotbringcellphoneintocampus.校園內(nèi)嚴(yán)禁攜帶手機(jī)。語(yǔ)法|情態(tài)動(dòng)詞的用法整理,非常實(shí)用!情態(tài)動(dòng)詞定義:情態(tài)動(dòng)詞是一種本身有一定的詞義,但要與動(dòng)詞原形一起使用,給謂語(yǔ)動(dòng)詞增添情態(tài)色彩,表示說(shuō)話人對(duì)有關(guān)行為或事物的態(tài)度和看法,認(rèn)為其可能、應(yīng)該或必情態(tài)動(dòng)詞后面加動(dòng)詞原形。分類:情態(tài)動(dòng)詞有四類:只做情態(tài)動(dòng)詞:must,can(could),may(might),oughtto可做情態(tài)動(dòng)詞又可做實(shí)義動(dòng)詞:need,dare可做情態(tài)動(dòng)詞又可做助動(dòng)詞:shall(should),will(would)具有情態(tài)動(dòng)詞特征:have(had)to,usedto位置:情態(tài)動(dòng)詞在句中放在謂語(yǔ)動(dòng)詞之前,謂語(yǔ)動(dòng)詞前若有助動(dòng)詞,則在助動(dòng)詞之前,疑問(wèn)句中,情態(tài)動(dòng)詞則在主語(yǔ)之前。Icanseeyou.Comehere.我能看見(jiàn)你,過(guò)來(lái)吧。Hemusthavebeenaway.他一定走了。WhatcanIdoforyou?我能幫你嗎?Howdareyoutreatuslikethat!你怎能那樣對(duì)待我們!特點(diǎn):情態(tài)動(dòng)詞無(wú)人稱和數(shù)的變化,情態(tài)動(dòng)詞后面跟的動(dòng)詞需用原形,否定式構(gòu)成是在情態(tài)動(dòng)詞后面加"not"。個(gè)別情態(tài)動(dòng)詞有現(xiàn)在式和過(guò)去式兩種形式,過(guò)去式用來(lái)表達(dá)更加客氣,委婉的語(yǔ)氣,時(shí)態(tài)性不強(qiáng),可用于過(guò)去,現(xiàn)在或?qū)?lái)。情態(tài)動(dòng)詞屬非及物動(dòng)詞,故沒(méi)有被動(dòng)語(yǔ)態(tài)。情態(tài)動(dòng)詞沒(méi)有非謂語(yǔ)形式,即沒(méi)有不定式,分詞,等形式。Hecouldbeheresoon.他很快就來(lái)。Wecan'tcarrytheheavybox.我們搬不動(dòng)那箱子。I'msorryIcan'thelpyou.對(duì)不起,我?guī)筒簧夏??;局鷦?dòng)詞與情態(tài)助動(dòng)詞最主要的區(qū)別之一是,基本助動(dòng)詞本身沒(méi)有詞義,而情態(tài)助動(dòng)詞則有自己的詞義,能表示說(shuō)話人對(duì)有關(guān)動(dòng)作或狀態(tài)的看法,或表示主觀設(shè)想:Whathaveyoubeendoingsince?(構(gòu)成完成進(jìn)行體,本身無(wú)詞義)IamafraidImustbegoing.(一定要)Youmayhavereadsomeaccountofthematter.(或許已經(jīng))除此之外,情態(tài)助動(dòng)詞還有如下詞法和句法特征:1) 除ought和used以外,其他情態(tài)動(dòng)詞后面只能接不帶to的不定式。如果我們把oughtto和usedto看做是固定詞組的話,那么,所有情態(tài)動(dòng)詞無(wú)一例外地只能接不帶to的不定式:Weusedtogrowbeautifulroses.Iaskedifhewouldcomeandrepairmytelevisionset.2) 情態(tài)助動(dòng)詞在限定動(dòng)詞詞組總是位居第一:Theyneednothavebeenpunishedsoseverely.3) 情態(tài)助動(dòng)詞用于第三人稱單數(shù)現(xiàn)在時(shí)的時(shí)候,沒(méi)有詞形變化,即其詞尾無(wú)-s形式:Shedarenotsaywhatshethinks.4) 情態(tài)動(dòng)詞沒(méi)有非限定形式,即沒(méi)有不定式和分詞形式,也沒(méi)有相應(yīng)的動(dòng)名詞:Still,sheneedn'thaverunaway.5) 情態(tài)助動(dòng)詞的“時(shí)”的形式并不是時(shí)間區(qū)別的主要標(biāo)志。在不少場(chǎng)合,情態(tài)助動(dòng)詞的現(xiàn)在時(shí)和過(guò)去時(shí)形式都可以表示現(xiàn)在、過(guò)去或?qū)?lái)時(shí)間:WouldyoumindverymuchifIaskyoutodosomething?Shetoldhimheoughtnottohavedoneit.情態(tài)助動(dòng)詞之間是相互排斥的,即在一個(gè)限定動(dòng)詞詞組中只能出現(xiàn)一個(gè)情態(tài)助動(dòng)詞,但有時(shí)卻可以與have和be基本助動(dòng)詞連用:Youshouldhavewashedthewound.Well,youshouldn'tbereadinganovel.用法首先它是動(dòng)詞,而且不同于行為動(dòng)詞,行為動(dòng)詞表示的是可以通過(guò)行為來(lái)表達(dá)的動(dòng)作(如寫(xiě),讀,跑),而情態(tài)動(dòng)詞只是表達(dá)的一種想法(如能,也許,敢)。用法是:情態(tài)動(dòng)詞+行為動(dòng)詞原形例句:IcanreadthissentenceinEnglish.我能用英語(yǔ)讀這句話。情態(tài)動(dòng)詞是一種本身有一定的詞義,表示說(shuō)話人的情緒,態(tài)度或語(yǔ)氣的動(dòng)詞,但不能單獨(dú)作謂語(yǔ),只能和其他動(dòng)詞原形構(gòu)成謂語(yǔ)。Wecanbethereontimetomorrow.我們明天能按時(shí)去那兒。MayIhaveyourname?我能知道你的名字嗎?Shallwebeginnow?我們現(xiàn)在就開(kāi)始嗎?Youmustobeytheschoolrules.你必須遵守校規(guī)。情態(tài)動(dòng)詞數(shù)量不多,但用途廣泛,主要有下列:can(could),may(might),must,need,oughtto,dare(dared),shall(should),will(would),have(to),hadbetter.功能助動(dòng)詞(auxiliary)主要有兩類:基本助動(dòng)詞(primaryauxiliary)和情態(tài)助動(dòng)詞(modalauxiliary)?;局鷦?dòng)詞有三個(gè):do,have和be;情態(tài)助動(dòng)詞有十三個(gè):may,might;can,could;will,would;shall,should;must,need,dare,usedto,oughtto.上述兩類助動(dòng)詞的共同特征是,在協(xié)助主動(dòng)詞構(gòu)成限定動(dòng)詞詞組時(shí),具有作用詞的功能:構(gòu)成否定式:Hedidn'tgoandneitherdidshe.Themeetingmightnotstartuntil5o'clock.2) 構(gòu)成疑問(wèn)式或附加疑問(wèn)式:Mustyouleaverightnow?YouhavebeenlearningFrenchfor5years,haven'tyou?3) 構(gòu)成修辭倒裝:Nowherecanheobtainanyinformationabouthissister.Hardlyhadhearrivedwhenshestartedcomplaining.4) 代替限定動(dòng)詞詞組:A:Whocansolvethiscrosswordpuzzle?B:Tomcan.A:ShallIwritetohim?B:Yes,do.情態(tài)動(dòng)詞的用法要點(diǎn)一.can和could情態(tài)動(dòng)詞用法例句can/could表示能力(體力、知識(shí)、技能)(表示過(guò)去有能力用could)“Idon'tthinkMikecantype.”canspeakfluentEnglishnow,butIcouldn'tlastyear.Canyouliftthisheavybox?(體力)Marycanspeakthreelanguages.(知識(shí))Canyouskate?(技能)Twoeyescanseemorethanone.兩只眼比一只眼看得清。Couldthegirlreadbeforeshewenttoschool?這女孩上學(xué)前能識(shí)字嗎?在肯定句中,表示客觀可能性,(客觀原因形成的能力)。并不涉及具體某事會(huì)發(fā)生,常用來(lái)說(shuō)明人或事物的特征。要表達(dá)具體某事實(shí)際發(fā)生的可能性時(shí),不用can,需用could,may,might。1.Asahumanbeing,anyonecanmakeamistake.I'mconfidentthatasolutioncanbefound.Hecanbeveryforgetfulsometimes.Imaystayathomethisweekend.(實(shí)際可能性)Petermightcometojoinus.(實(shí)際可能性)Itwillbesunnyinthedaytime,butitcouldraintonight.(實(shí)際可能性)7.They'vechangedthetimetable,sowecangobybusinstead.8.Thishallcanhold500peopleatleast.Thetemperaturecanfallto-60°C,thatis60°Cbelowfreezing.氣溫可降至一60°C,也就是零下60°C。11..Hecan?t(couldn?t)haveenoughmoneyforanewcar.他不可能有足夠的錢(qián)買(mǎi)新車(chē)。12Youmustn?tsmokewhileyou?rewalkingaroundinthewood.Youcouldstartafire.(實(shí)際可能性)在林子里走時(shí)勿吸煙,那樣可能會(huì)引起火災(zāi)。表示請(qǐng)求和允許。表示請(qǐng)求,口語(yǔ)中常用could代替can,使語(yǔ)氣更委婉。用can和may來(lái)回答,不能用could或might。l.Canweturntheairconditioneron?Anypoliceofficercaninsistonseeingadriver'slicense.3.Insoccer,youcan'ttouchtheballwithyourhands.Couldyouhavehercallmebackwhenshegetshome,please?wonderifIcouldjustaskyoutosignthis.CouldIborrowyourdictionary?---Yes,ofcourse,youcan.No,I'mafraidnot/No,youcann't/No,youmaynot.表示對(duì)現(xiàn)在的動(dòng)作或狀態(tài)進(jìn)行主觀的猜測(cè),主要用在否定句和疑問(wèn)句中。1.Itcan'tbeeasycaringforamanandachildwhoarenotyourown.Canthemanovertherebeourheadmaster?3.IfTomdidn'tleavehereuntilfiveo'clock,hecan'tbehomeyet.如果湯姆五點(diǎn)才離開(kāi)這兒,他此時(shí)一定還未到家。表示驚異、懷疑、不相信等態(tài)度,主要用在否定句、疑問(wèn)句和感嘆句中。1.Canthisbeanexcusefornotgivingthemhelp?Thiscan'tbetrue.Howcanyoubesocrazy.4.Canthisbetrue?5.Howcanyoubesocareless!6.Thiscannotbedonebyhim.Wherecan(could)theyhavegoneto?他們會(huì)去哪兒了呢?Hecan?t(couldn?t)beoversixty.他不可能超過(guò)六十歲。Howcanyoubesocareless?你怎么這么粗心?特別說(shuō)明:(1)could用來(lái)表示請(qǐng)求時(shí),語(yǔ)氣委婉,主要用于疑問(wèn)句,不能用于肯定句,答語(yǔ)應(yīng)用can(即:could不能用于現(xiàn)在時(shí)態(tài)的簡(jiǎn)略答語(yǔ)中)。如:CouldIuseyourdictionary?Yes,youcan.(否定回答可用:No,I'mafraidnot.)此時(shí)可與may互換。在疑問(wèn)句中還可用could,might代替,不是過(guò)去式,只是語(yǔ)氣更委婉,不能用于肯定句和答語(yǔ)中。 CouldIcometoseeyoutomorrow? Yes,youcan.(No,I'mafraidnot.)(2)can和beableto辨析can(could)和匕6ableto都可以表示能力,意思上沒(méi)有區(qū)別。但can只有現(xiàn)在式和過(guò)去式,而beableto則有更多的形式。如:I'vealwayswantedtoabletospeakfluentEnglish.Thosebagslookreallyheavy,areyousureyou'llbeabletocarrythemonyourown?但是,表示在過(guò)去某時(shí)的某一場(chǎng)合經(jīng)過(guò)一番努力,終于做成了某事,通常不用could,而用was/wereableto來(lái)表示。could:有潛能,但并未做到這時(shí),was/wereableto相當(dāng)于managedtodo或succeedindoing。如:Aftertheaccidentitwasalongtimebeforeshewasabletowalkagain.Thefirewasverybig,butmostpeoplewereabletoescapefromthebuilding.IcansingmanyEnglishsongs.我會(huì)唱許多英文歌曲。Wewereabletoreturntoourcampsitebeforetheheavyrain.我們?cè)谙麓笥昵霸O(shè)法會(huì)到了野營(yíng)地。Hewasabletoswimacrosstheriverandescapedbeingcaught.他游到了河對(duì)岸,沒(méi)有被抓住。在否定句中,can/could與beableto幾乎沒(méi)有什么差別,兩者可以互換。例如:Shewasn'tableto/couldn'tcookFrenchdishes.她不會(huì)做法國(guó)菜。⑶慣用形式“cannot…七。o…"表示“無(wú)論怎么 也不(過(guò)分)"。如:Youcannotbetoocareful.你越小心越好。慣用形式“cannotbut+不定式(不帶to)”表示“不得不,只好”。如:Icannotbutadmireherdetermination.我不得不欽佩你的決心。二.may和might情態(tài)動(dòng)詞用法例句may/might表示允許、請(qǐng)求。否定回答一般用mustnot/mustn't,表示“禁止、阻止”之意,但也可以用hadbetternot(最好別)或maynot(不可以),語(yǔ)氣較為委婉。1.MayIcomeinandwait?——MayIsmokehere? No,youmustn't(或No,you'dbetternot.)在表示請(qǐng)求、允許時(shí),might比may語(yǔ)氣更委婉些。而不是過(guò)去式,用MayI征詢對(duì)方許可在文體上比較正式,在口氣上比較客氣,在日常用語(yǔ)中,用CanI征詢對(duì)方意見(jiàn)更為常見(jiàn)。否定回答時(shí)可用can't或mustn't,表示“不可以,禁止”?;蛘呖隙ɑ卮鹂梢杂脃es,please./Certainly.1.MightIborrowyourpen?wonderifImightspeaktoyourson.Might/MayIsmokeinthisroom? No,youmustn't.4.May/MightItakethisbookoutoftheroom? Yes,youcan.(No,youcan't/mustn't.)\Youmaydrivethecar.—MightIuseyourpen?—No,youmustn't.表示可能性的推測(cè),通常用在肯定句和否定句中,含有“或許”“大概”“可能"之意;用might代替may時(shí),則語(yǔ)氣顯得更加不肯定。1.Itmayrainthisafternoon.Shemightcometojoinusthisafternoon.Isupposehemighthavemissedthetrain.Hemay/mightbeverybusynow.Yourmothermay/mightnotknowthetruth.may用于祈使句表示祝愿1.Mayyousucceed.。Mayyouhavemanymoredaysashappyasthisone.Maysherestinpeace.愿她安息。慣用句式:“maywell+動(dòng)詞原形",意為“完全能,很可能",相當(dāng)于tobeverylikelyto“mayaswell或might(just)aswell+動(dòng)詞原形"意為“最好,滿可以,倒不如,不妨",”,相當(dāng)于“hadbetter或thereisnoreasontodoanythingelse.1.ItmaywellchangeforeverthewayyoulookatGreekart.Theremaywellbearealproblemhere.Thereisnothingtodo,soImayaswellgotobed.Youmayaswelltellusnow,we'llfindoutsoonerorlater.Isupposewemightaswellgohome.Andifyouhavetoploughthefieldanyway,youmightaswellplantitatthesametime.7.Ifthatisthecase,wemayaswelltry.might間接引語(yǔ)中指過(guò)去。表可以。1.HetoldmethatImightsmokeintheroom.他告訴我可以在房間里抽煙。二.must和haveto情態(tài)動(dòng)詞用法例句must表示“必須,應(yīng)該,一定"之意,語(yǔ)氣比should,oughtto強(qiáng)烈。其否定形式mustn't表示“不準(zhǔn),不應(yīng)該,禁止"等意.1.Youmustcometoschoolontime.Everybodymustobeythelaw.Youmustn'tdrivesofastinthestreet.Wemustn'twasteanymoretime.Imustfinishmyworktoday.MustIreturnthebooktomorrow?7.Theplayisnotinteresting.Ireallymustgonow.在回答帶有must的問(wèn)句時(shí),否定回答常用needn't或don'thaveto,表示“不必",而不用mustn't.1.—MustIcomebackbeforeten?—Yes,youmust.(No,youneedn't)Mustwehandinourexercisebookstoday?—Yes,youmust.(No,youdon'thaveto.)表示有把握的推測(cè),意為“一定、準(zhǔn)是、想必”,只用于肯定句中。它的否定或疑問(wèn)式用can代替must1.Thismustbeyourpen.Youmustbehungryafterawalk.Theremustbeaholeinthewall.You'reTom'sgoodfriend,soyoumustknowwhathelikesbest.5.Yourmothermustbewaitingforyounow.Hemustbestayingthere.他現(xiàn)在肯定呆在那里。試比較和第一種用法的區(qū)別Hemuststaythere.他必須呆在那。haveto也可拼做havegotto?!氨仨?,不得不”,意義與must相近。但must表示的是說(shuō)話人的主觀看法,而haveto則往往強(qiáng)調(diào)客觀需要,有被動(dòng)接受的意思。無(wú)疑問(wèn)句形式,疑問(wèn)句用must代替。10.Thefilmisnotinteresting.Ireallymustgonow.Ihavetogonow,becausemymotherisinhospital.Mybrotherwasveryill,soIhadtocallthedoctorinthemiddleofthenight.我弟弟病得很厲害,我只得半夜里把醫(yī)生請(qǐng)來(lái)。(客觀上需要做這件事)4.MustIcleanalltheroom?5.Imustgooverthetestpaperagaintoseeifthereareanymistakes.我必須再檢查一遍試卷看看是否有錯(cuò)誤。6.Theteachersaidthatthereweremanymistakesinmytestpaper,soIhadtogooveritagain.老師說(shuō)我試卷中有很多錯(cuò)誤,所以我只好再檢查一遍。must只有一種形式,即現(xiàn)在式與過(guò)去式都是一種形式,在間接引語(yǔ)中must可用于表示過(guò)去時(shí)間?而haveto則涉及各種人稱、時(shí)態(tài)等方面的變化形式。18.7..IhadtoworkhardwhenIwasyourage.8..Iwillhavetolearnhowtouseacomputer.9.Inordertotaketheexam,we'llhavetofinishthewholebookbytheendofthismonth.10.toldherthatshemustgiveupsmoking.我叫她必須戒煙。22.兩者的否定意義不同,mustn't表示“禁止,不許”,don'thaveto表示不必。1.Youmustn'tgothere.Youdon'thavetogothere.shall和should情態(tài)動(dòng)詞用法例句shall用于第一,三人稱構(gòu)成的疑問(wèn)句,表示征求對(duì)方意見(jiàn)或請(qǐng)求指示1.ShallIopenthewindow?Shallwesay6o'clock,then?WhatshallIgetfordinner?4.Shallwebeginourlesson?5.Whenshallhebeabletoleavethehospital?Shalltheboywaitoutside?讓那男孩在外面等嗎?用于第二、三人稱陳述句中,表示說(shuō)話人給對(duì)方的命令、警告、決心、允諾或威脅。1.Don'tworry,youshallgettheanswerthisafternoon.(允諾)Heshallbesorryforitoneday,Itellyou.(警告)YoushalldoasIsay.(命令)Ifyouchildrendon'tdoasItellyou,youshallnotgototheparty.(威脅)Youshallfailifyoudon'tworkhard.(警告)HeshallhavethebookwhenIfinishit.(允諾)Heshallbepunished.(威脅)YoushalldoasIsay.按我說(shuō)的做。(命令)Youshallhavemyanswertomorrow.你明天可以得到我的答復(fù)。(允諾)Heshallbesorryforitoneday,Itellyou.有一天他會(huì)后悔的,我告訴你。(警告)Nothingshallstopusfromcarryingouttheplan.什么也不能阻止我們執(zhí)行這項(xiàng)計(jì)劃。(決心)should表示勸告或建議,意為“應(yīng)該”其同義詞是oughtto;在疑問(wèn)句中,通常用should代替oughtto1.WhatshouldIdo?2.ShouldItrusthim?Youshouldreadhisnewbook.Youshouldgotoclassrightaway.5.ShouldIopenthewindow?Youshouldbepolitetoyourteachers.你對(duì)老師應(yīng)該有禮貌。Youshouldn?twasteanytime.你不應(yīng)該浪費(fèi)時(shí)間。表示推測(cè),用在肯定句中,對(duì)現(xiàn)在的情況或可能發(fā)生的事的主觀推測(cè)或期待。意為“想必,大概,或許”1.Itshouldbeanicedaytomorrow.TryphoningRobert,heshouldbehomenow.Heshouldbearoundsixtyyearsold.Thefilmshouldbeverygoodasitisstarringfirst—classactors.這部新電影是一流演員主演的,估計(jì)拍得很好。Theyshouldbehomebynow.照說(shuō)他們現(xiàn)在應(yīng)當(dāng)已經(jīng)到家了。還可以用在if引導(dǎo)的條件句中,表示一件事聽(tīng)起來(lái)可能性很小,但也不是完全不可能,相當(dāng)于“萬(wàn)一”的意思。從句謂語(yǔ)用should+動(dòng)詞原形構(gòu)成,主句都一定用虛擬語(yǔ)氣1.AskTomtoringmeupifyoushouldseehim.(你萬(wàn)一見(jiàn)到湯姆,請(qǐng)讓他給我打個(gè)電話)ShouldIbefreetomorrow,I'llcome.(萬(wàn)一我明天有時(shí)間,我就過(guò)來(lái))Ifthingsshouldchangesuddenly,pleaseletmeknow.(萬(wàn)一情況突變,請(qǐng)通知我)Askhertoringmeupifyoushouldseeher.你萬(wàn)一見(jiàn)到她,請(qǐng)讓她給我打個(gè)電話。Ifyoushouldchangeyourmind,pleaseletusknow.萬(wàn)一你改變主意,請(qǐng)通知我們。6.ShouldI(IfIshould)befreetomorrowIwillcome.萬(wàn)一我明天有時(shí)間,我就來(lái)。用于疑問(wèn)句或感嘆句中,表示意外、驚異的情緒,意為“竟會(huì)",與why,what,how,who連用,如果是疑問(wèn)句。則不需要回答。1.WhyshouldanyonewanttomarryTony?Don'taskme.HowshouldIknow?Whyshouldyoubesolatetoday?你幾天怎么來(lái)得這么晚?—WhereisBettyliving?—貝蒂住在哪里?—HowshouldIknow?—我怎么會(huì)知道呢?don'tknowwhyyoushouldthinkthatIdidit.我真不知道你憑什么認(rèn)為這件事是我干的。表示說(shuō)話人的一種謙遜、客氣、委婉的語(yǔ)氣。Ishouldthinkitwouldbebettertotryitagain.我倒是認(rèn)為最好再試一試。Youaremistaken,Ishouldsay.依我看,你是搞錯(cuò)了。Ishouldadviseyounottodothat.我倒是勸你別這樣做。will和would情態(tài)動(dòng)詞用法例句will/would用于表示意志,愿望或意愿。will指現(xiàn)在,would指過(guò)去。1.Heisthemanwhowillgohisownway.(他是個(gè)自行其是的人。)Theysaidtheywouldmeetusat10:30atthestation.Iwillneverdothatagain.Theyaskedhimifhewouldgoabroad.Hesaidhewouldhelpme.6.I'lldomybesttocatchupwiththem.willdoanythingforyou.我愿為你做任何事。Noneissoblindasthosewhowon?tsee.不愿看的人眼最瞎。9.Ifyouwillreadthebook,I?lllendittoyou.如果你愿意讀這本書(shū),我會(huì)把它借給你。Theywouldnotlethiminbecausehewaspoorlydressed.他們不讓他進(jìn)去因?yàn)樗轮婆f。IsaidIwoulddoanythingforyou.我說(shuō)過(guò)我愿意為你做任何事。表示請(qǐng)求、建議等,will接近命令的口氣。用would比用will委婉、客氣。Wouldliketodo=wantto想要,為固定搭配否定句用will,—般不用would,won'tyou是一種委婉語(yǔ)氣。1.Willyoupleasetakeamessageforhim?Wouldyoupleasetellmeyourtelephonenumber?Will/Wouldyoupassmetheball,please?4Wouldyouliketogowithme?Wouldyoulikesomecake?6Won'tyousitdown?表示習(xí)慣或傾向,意為“總是,慣于"。Will指現(xiàn)在,would指過(guò)去。would表示過(guò)去習(xí)慣時(shí)比usedto正式,且沒(méi)有“現(xiàn)已無(wú)此習(xí)慣”的含義。usedto可表示過(guò)去的習(xí)慣動(dòng)作和經(jīng)常的情況,而would只表示過(guò)去的習(xí)慣動(dòng)作,不表示狀態(tài)和情況。Fishwilldiewithoutwater.Peoplewilltalk.(人們總會(huì)說(shuō)閑話。)Whenweworkedinthesameoffice,wewouldoftenhavecoffeetogether.Duringthevacation,hewouldvisitmeeveryotherday.Theboywillsittherehourafterhourlookingatthetrafficgoby.那男孩常常坐在那里好幾個(gè)鐘點(diǎn),看著車(chē)輛行人通過(guò)。Heusedto/wouldsmokewhilewriting.過(guò)去他寫(xiě)東西時(shí)常抽煙。7.Sheusedtobefat.她過(guò)去很胖表示推測(cè),意為“很可能,大概"。will表示推測(cè)比should把握大,比must把握小。1.Thesethingswillhappen.Thatwillbethemessengerringing.Itwouldbeaboutteno'clockwhenhelefthome.Itwouldbeaboutteno'clockwhenshelefthome.表示功能,意為“能,行"。慣用形式:willdo/woulddo表示“解決問(wèn)題”、“就行”。1.Thatwillbeallright.Eitherpenwilldo.Itwouldnotdotoworktoolate.(工作太晚不行。)用于否定句中,意為“不肯"、“不樂(lè)意"l.Iwon'tlistentoyournonsense.NomatterwhatIsaid,hewouldn'tlistentome.Will用于敘述真理時(shí)l.Oilwillfloatonwater.油能浮在水面上。Manwilldie.人總會(huì)死的。用于表示具有某種功能時(shí)l.Thedoorwillnotopen.門(mén)打不開(kāi)。2Thecarwillnotstart.車(chē)子啟動(dòng)不了。特別說(shuō)明:would與usedto辨析would可用來(lái)表示過(guò)去反復(fù)出現(xiàn)的動(dòng)作,但不能表示過(guò)去存在的狀態(tài),所以我們不能說(shuō):“shewouldbeaquietgirl."另外,would強(qiáng)調(diào)過(guò)去某種特定情況下的活動(dòng),是完全過(guò)去的事情,同現(xiàn)在沒(méi)有聯(lián)系。而usedto則著眼于過(guò)去和現(xiàn)在的對(duì)比,隱含現(xiàn)在已不存在,動(dòng)作或狀態(tài)都可表示。Would可以表示不規(guī)則的習(xí)慣,usedto則不可。如:Heusedtobeanaughtyboyandcausetrouble.Iusedtogetupatsixinthemorning.Sometimesshewouldtakeawalkintheneighboringwoods.Inthosedays,wheneverIhaddifficulties,IwouldgotoMr.Chenforhelp.need和dare情態(tài)動(dòng)詞用法例句need用于表示“需要,必要”之意。做情態(tài)動(dòng)詞時(shí),僅用于否定句和疑問(wèn)句,(在肯定句中一般用must,haveto,oughtto,should代替。)只有現(xiàn)在時(shí),1.—Needweleavesoon?—Yes,youmust.(No,youneedn't)Youneedn'tcomesoearly. NeedIfinishtheworktoday? Yes,youmust./No,youneedn't.--NeedIcome?--Yes,youmust.--我需要來(lái)嗎?--需要。4Youneedn?ttelephonehimnow.你現(xiàn)在不必打電話給他。don?tthinkyouneedworry.我想你不必發(fā)愁。6.Shedarenotgooutaloneatnight.她晚上不敢一個(gè)人出去。HowdareyousayI?munfair?你竟敢說(shuō)我不公平?Notoneofthemdaredmentionthis.他們誰(shuí)也不敢提這件事做實(shí)義動(dòng)詞時(shí),其變化與一般的實(shí)義動(dòng)詞相同,有人稱、時(shí)態(tài)和數(shù)的變化,后接帶to的不定式或者名詞。,過(guò)去式用needed、didyouneed?和didn'tneed,肯定式用needs/needed/need,疑問(wèn)式用do、does、did提問(wèn),否定式要在前面加don't、doesn't、didn't(needdoing=needtobedone)表被動(dòng)1.Ajoblikenursingneedspatienceandunderstanding.(need+名詞,needunderstanding二needtobeunderstood,需要被理解)Heneedstoseeadoctor.(needtodo)Doyoustillneedvolunteerstohelpcleanupaftertheparty?(needsomebodytodosomething)Theydidn'tneedtostartsoearly.(donotneedtodo)Youdon?tneedtodoityourself.你不必親自做這件事。Weneedtotellthemthenews.我們需要把這消息告訴他們。Thetableneedspainting(tobepainted.).桌子需要油漆一下。Weshoulddaretogiveourownopinion.我們要敢于提出自己的觀點(diǎn)。Hedidnotdare(to)lookup.他不敢抬頭看。10..Idaredayhe?llcomeagain.我想他會(huì)再來(lái)的。dare用于表示“敢于”之意。做情態(tài)動(dòng)詞,沒(méi)有人稱和數(shù)的變化,主要用于否定句、疑問(wèn)句和條件狀語(yǔ)從句中。過(guò)去式形式為dared?!狣areyoutellherthetruth?—Yes,Idare./No,Idaren't.Howdareyouaccusemeoflying!Hedaren'tadmitthis.HowdareyousayI'munfair?Hedaren'tspeakEnglishbeforesuchacrowd,darehe?Ifwedarednotgotherethatday,wecouldn'tgetthebeautifulflowers.用作實(shí)義動(dòng)詞時(shí),其變化與一般的實(shí)義動(dòng)詞相同。在肯定句中,dare后接帶to的不定式;否定句中,dare后既可接帶to的不定式,也可接不帶to的不定式。Onlyafewjournalistsdaredtocoverthestory.Hedoesn'tdare(to)gotherealone.Don'tyoudare(to)touchit?daretoswimacrossthisriver.Hedoesn'tdare(to)answer.Heneedstofinishhishomeworktoday.daretoswimacrossthisriver.Hedoesnotdare(to)answer.9.Don'tyoudare(to)touchit!wonderedhedare(to)saythat.11.Heneedstofinishitthisevening.ought的用法:情態(tài)動(dòng)詞用法例句oughttodo表示“應(yīng)該"之意1.Yououghttotakecareofhim.—OughtIgonow?—Yes,yououghtto./No,yououghtn'tto.3Yououghttobringthechildhere.表示推測(cè)。注意與must表示推測(cè)是的區(qū)別1.Hemustbehomebynow.(斷定他已到家)Heoughttobehomebynow.(不十分肯定)Thisiswheretheoilmustbe.(比較直率)Thisiswheretheoiloughttobe.(比較含蓄)hadbette表示"最好"hadbetterdosthhadbetternotdosthItisprettycold.You'dbetterputonmycoat.She'dbetternotplaywiththedog.wouldratherwouldratherdowouldrathernotdowouldrather…than…寧愿 而不愿。wouldsooner,hadratherhadsooner表示"寧愿,寧可"fIhaveachoice,Ihadsoonernotcontinuemystudiesatthisschool.Iwouldratherstayherethangohome.=Iwouldstayhereratherthangohome.說(shuō)明:should與oughtto表示“應(yīng)該"時(shí)的區(qū)別should表示自己的主觀看法,oughtto的語(yǔ)氣中,含有“按道理應(yīng)該……”之意。(客觀推測(cè)),若要反映客觀情況或涉及法律義務(wù)和規(guī)定,一般用oughtto。oughtto表示義務(wù)或責(zé)任,比should語(yǔ)氣重。must(主觀推測(cè))。如:Youshouldhelpthemwiththeirwork.Youarehisfather.Yououghttogethimtoreceivegoodeducation.Hemustbehomebynow.Heoughtto/shouldbehomebynow.Thisiswheretheoilmustbe.Thisiswheretheoiloughtto/shouldbe.shouldhelpherbecausesheisintrouble.Yououghttotakecareofthebaby.2)表示勸告、建議和命令。should,oughtto可通用,但在疑問(wèn)句中常用should。Youshould/oughttogotoclassrightaway.ShouldIopenthewindow?“情態(tài)動(dòng)詞+havedone”用法情態(tài)動(dòng)詞+havedone用法例句musthavedone表示主觀上對(duì)過(guò)去已經(jīng)發(fā)生的行為進(jìn)行推測(cè),意為“想必,準(zhǔn)是,一定做了某事"肯定句中。否定句用can代替mustl.Shemusthavegonethroughalot.HemusthavevisitedtheWhiteHouseduringhisstayintheUnitedStates.Lindahasgonetowork,butherbicycleisstillhere.---Shemusthavegonebybus.may/mighthavedone表示對(duì)過(guò)去已發(fā)生行為的推測(cè),意為“也許/或許已經(jīng)(沒(méi)有)……“。一般用于肯定句或否定句中,不用于疑問(wèn)句。用might則表示語(yǔ)氣更加不肯定。1.Youmayhavelearntthenews.Hemaynothaveheardhisnamecalled.SorryI'mlate.Imighthaveturnedoffthealarmclockandgonebacktosleepagain.can???havedonecannothavedone表示對(duì)過(guò)去發(fā)生的行為的懷疑和不肯定,通常用在否定句和疑問(wèn)句中。(can換成could時(shí)語(yǔ)氣委婉)否定句表示:過(guò)去一定不。。。1.Wherecanshehavegone?Couldhehavedonesuchafoolishthing?Theboycan'thavefinishedreadingthebooksosoonbecauseitisdifficulteventoanadult.couldhavedone可用于肯定句中,表示“可能已經(jīng)"之意,幾乎等于may/mighthavedone。后者更委婉一些。此外,還可以表示過(guò)去能做而沒(méi)做的事,有一種對(duì)過(guò)去為付諸實(shí)施的事情的惋惜?;颉边^(guò)去可能。。?;虮緛?lái)能。。。而實(shí)際沒(méi)有Hecouldhavekilledhimselfdrivingatadangerousspeed.Youcouldhavebeenmoreconsiderate.Youcouldhavedonebetter,butyouweretoocareless.Shecouldhavebeenhiswife.她以前可能是他的妻子。她本應(yīng)該是他的妻子。mighthavedone表示“本來(lái)可能 ,但實(shí)際上沒(méi)有發(fā)生的事情"。另外,還可以表示“本來(lái)應(yīng)該或可以做某事”之意,含有輕微的責(zé)備語(yǔ)氣。1.Youshouldnotswiminthatsea.Youmighthavebeeneatenbyashark.Hemighthavegivenhimmorehelp,thoughthewasbusy.should/oughttohavedone用于肯定句時(shí),表示本該做某事,而實(shí)際上未做;用于否定句時(shí),則表示不該做的事反而做了。1.Heshouldhaveknownthatthepolicewouldneverallowthissortofthing.Youshouldn'thavedoneitsocarelessly.Yououghttohavereturnedthebookearlier.Yououghtnottohaverefusedhisoffer.5.Sheshouldhavefinishedit.6.Ishouldhavehelpedher,butInevercould.7.Youshouldhavestartedearlier.Yououghtnottohavetakenthebookoutofthereading-room.needn'thavedone表示做了本來(lái)不必去做的事。注意:didn'tneedtodo表示“沒(méi)必要做而實(shí)際上也沒(méi)有做某事"l.Youneedn'thavewateredtheplants,foritisgoingtorain.didn'tneedtobuythedictionary.Ihadacopyathome.Youneedn'thavewaitedforme.hadbetterhavedone用于事后的建議,含輕微責(zé)備的口吻,意為“當(dāng)時(shí)最好做了某事",其否定式hadbetternothavedone表示相反的含義。l.Youhadbetterhavestartedearlier.2.Youhadbetternothavescoldedher.wouldratherhavedone表示“當(dāng)時(shí)寧愿做了某事",其否定式wouldrathernothavedone表示相反的含義,兩者都表示“后悔"之意。1.1.1wouldratherhavetakenhisadvice.2.Iwouldrathernothavetoldhimthetruth.musttohavebeendoing等表示對(duì)過(guò)去某時(shí)正發(fā)生的事情的推測(cè)情態(tài)動(dòng)詞后跟進(jìn)行式,表示“想必正在……”,“可能正在……”,“應(yīng)當(dāng)正在”等意。1--Whydidn'tyouanswermyphonecall?---Well,Imusthavebeensleeping,soIdidn'thearit.It?stwelveo?clock.Theymustbehavinglunch.現(xiàn)在是十二點(diǎn)。他們一定正在吃飯。Theymaybediscussingthisproblem.他們可能正在論討這個(gè)問(wèn)題。Hecan?tbetellingthetruth.他說(shuō)的不可能是真話。5.Sheshouldn?tbeworkinglikethat.She?sstillsoweak.她不應(yīng)當(dāng)那樣干,她身體仍那么虛。n情態(tài)動(dòng)詞表示猜測(cè)肯定:must>should>could>may>mightn否定:can't>shouldn't>couldn't>maynot>n表示要求,命令時(shí),語(yǔ)氣由should(應(yīng)該)、hadbetter最好)、must(必須)漸強(qiáng)。必須掌握情態(tài)動(dòng)詞表示推測(cè)語(yǔ)氣時(shí)的反意疑問(wèn)句。例如:Theroadiswet.Itmusthaverained,hasn'tit?Theroadiswet.Itmusthaverainedlastnight,didn'tit?(多了過(guò)去時(shí)的時(shí)間狀語(yǔ))Imethimonhiswayhome.Hecan'tbeinthelibrarynow,isn'the?Thecoatistooclosetothefire.Itmightgetburnt,doesn'tit?情態(tài)動(dòng)詞的基本用法歸納情態(tài)動(dòng)詞有can(could),may(might),must,haveto,shall(should,will(would),dare(dared),need(needed),oughtto等。情態(tài)動(dòng)詞無(wú)人稱和數(shù)的變化;不能單獨(dú)使用,必須與其后的動(dòng)詞原形構(gòu)成謂語(yǔ)。一、 can,could表示能力(體力、知識(shí)、技能)。Canyouliftthisheavybox?(體力)Marycanspeakthreelanguages.(知識(shí))Canyouskate?(技能)此時(shí)可用beableto代替。Can只有一般現(xiàn)在時(shí)和一般過(guò)去式;而beableto則有更多的時(shí)態(tài)。I'llnotbeabletocomethisafternoon.當(dāng)表示“經(jīng)過(guò)努力才得以做成功某事”時(shí)應(yīng)用beableto,不能用Can。如:Hewasabletogotothepartyyesterdayeveninginspiteoftheheavyrain.表示請(qǐng)求和允許。 CanIgonow? Yes,youcan./No,youcan't.此時(shí)可與may互換。在疑問(wèn)句中還可用could,might代替,不是過(guò)去式,只是語(yǔ)氣更委婉,不能用于肯定句和答語(yǔ)中。 CouldIcometoseeyoutomorrow? Yes,youcan.(No,I'mafraidnot.)表示客觀可能性(客觀原因形成的能力)。They'vechangedthetimetable,sowecangobybusinstead.Thishallcanhold500peopleatleast.4) 表示推測(cè)(驚訝、懷疑、不相信的態(tài)度),用于疑問(wèn)句、否定句和感嘆句中。Canthisbetrue?Thiscan'tbedonebyhim.Howcanthisbetrue?二、 may,might1) 表示請(qǐng)求和允許。might比may語(yǔ)氣更委婉,而不是過(guò)去式。否定回答時(shí)可用can't或mustn't,表示“不可以,禁止"。 Might/MayIsmokeinthisroom? No,youmustn't. May/MightItakethisbookoutoftheroom? Yes,youcan.(No,youcan't/mustn't.)用MayI...?征徇對(duì)方許可時(shí)比較正式和客氣,而用CanI...?在口語(yǔ)中更常見(jiàn)。2) 用于祈使句,表示祝愿。Mayyousucceed!3) 表示推測(cè)、可能性(不用于疑問(wèn)句)。might不是過(guò)去式,它所表示的可能性比may小。Hemay/mightbeverybusynow.Yourmothermay/mightnotknowthetruth.三、 must,haveto1) 表示必須、必要。Youmustcomeintime.在回答引出的問(wèn)句時(shí),如果是否定的,不能用mustn't(禁止,不準(zhǔn)),而用needn't,don'thaveto(不必). Mustwehandinourexercisebookstoday? Yes,youmust. No,youdon'thaveto/youneedn't.must是說(shuō)話人的主觀看法,而haveto則強(qiáng)調(diào)客觀需要。Must只有一般現(xiàn)在時(shí),haveto有更多的時(shí)態(tài)形式。heplayisn'tinteresting,Ireallymustgono

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