情態(tài)動(dòng)詞基本用法講解

Model

Verbs情態(tài)動(dòng)詞1.獅子餓了會(huì)攻擊人。2.我七歲時(shí)就會(huì)游泳了。3.她會(huì)在哪兒呢？她一定在圖書(shū)館，約翰剛才還在那里見(jiàn)到她。4.雖然已經(jīng)很晚了，他一定要去醫(yī)院看他的一個(gè)同學(xué)。5.公路上一定發(fā)生了車(chē)禍。6.他們一定有麻煩了。我們?nèi)退麄円幌潞脝?？表意表示說(shuō)話人的情緒，態(tài)度或語(yǔ)氣等。情態(tài)動(dòng)詞的語(yǔ)法特征1)接動(dòng)詞原形：Mv+do×Thegirlcandancingverywell.2)Mv無(wú)人稱(chēng),數(shù)的變化×Thegirlcansdanceverywell.3)謂語(yǔ)部分=Mv+do

×Thegirlcanverywell.

能力

Thegirlcandanceverywell.Noonecouldfinishit.

可能性

Canthenewsbetrue?Who

canitbe?Itcan’tbemymother.許可

CanIsithere?

1.can/could：2.may和might

：許可（正式）:

MayIcomein?Youmaygonow.可能性

Imaybewrong.

Theguest

may

arrivethisafternoon.祝愿

May

yousucceed!

May

youhaveagoodjourney!3.shall：征求意見(jiàn)，疑問(wèn)句Shall

wegobytrain,Mom?Shall

hesithere?允諾、警告、命令或威脅等（二，三人稱(chēng)）陳述句

Youshallbepunishedifyoubreaktherule.

4.should應(yīng)該Youshouldkeepyourpromise.推測(cè)It’s10pm.Sheshouldbeathomenow.“竟然”I’msoangry.Heshould

refusemyinvitation.

5.must必須Wemustlearnbyheart.推測(cè)

You

must

be

the

new

teacher.（現(xiàn)在）

He

must

be

eating.（進(jìn)行）There

is

nobody

here.

They

must

have

allgone

home.（過(guò)去）6.will意愿Comewheneveryouwill.Iwillneverdothatagain.請(qǐng)求，建議Willyoutypethis,please?7.would意愿ItoldhimthatIwouldneverdothatagain.請(qǐng)求，建議(更客氣）Wouldyoutypethis,please?與完成時(shí)have

done的連用近義詞辨析一些提問(wèn)的答語(yǔ)固定搭配當(dāng)中的情態(tài)動(dòng)詞Mv的其他要點(diǎn)與完成時(shí)have

done的連用近義詞辨析一些提問(wèn)的答語(yǔ)固定搭配當(dāng)中的情態(tài)動(dòng)詞Mv的其他要點(diǎn)情態(tài)動(dòng)詞與完成時(shí)連用（1）mayhavedone表示談?wù)撨^(guò)去的某種可能性，而這種可能性現(xiàn)在仍然存在，意為“或許已經(jīng)，可能已經(jīng)”。例如：ShemayhavefinisheditlastFriday.她上周五可能就完成了。Hemayhavereceivedtheletter.他可能已經(jīng)收到那封信了。情態(tài)動(dòng)詞與完成時(shí)連用（2）mighthavedone表示談?wù)撨^(guò)去的某種可能性，還可表示過(guò)去應(yīng)該做而沒(méi)做的事，意為“本來(lái)可能”。例如：Theymighthaveknownthematterearlier.他們可能早知道那件事了。Theproposalmighthavebeenrefused.這個(gè)建議本該拒絕的。情態(tài)動(dòng)詞與完成時(shí)連用（3）musthavedone用于肯定句，表示對(duì)過(guò)去發(fā)生的事情肯定的推測(cè)，意為“一定……，想必……”。例如：Itmusthaverainedlastnight,forthegroundiswet.昨晚一定下雨了，因?yàn)榈厥菨竦?。Shemusthavegonethroughalot.她一定吃過(guò)很多苦。情態(tài)動(dòng)詞與完成時(shí)連用（4）canhavedone表示推測(cè)過(guò)去的某種行為，表示“可能”。例如：Wherecanshehavegone?她可能到哪里去了呢？（5）couldhavedone既可以表示推測(cè)過(guò)去的某種行為，也可表示過(guò)去可能做的事而沒(méi)有做，couldn’thavedone表示過(guò)去不大可能發(fā)生的事。例如：Wherecouldshehavegone?她可能到哪里去了呢？Inthosecircumstanceswecouldhavedonebetter.在那樣的情況下，我們本來(lái)可以做得更好。Theboycouldn’thavefinishedreadingthebooksosoonbecauseitwasdifficulteventoanadult.那個(gè)孩子不可能那么快就把這本書(shū)讀完，因?yàn)榧词箤?duì)一個(gè)成人來(lái)說(shuō)，這本書(shū)也很難。（6）shouldhavedone表示過(guò)去應(yīng)該做的事而沒(méi)有做，shouldn’thavedone表示過(guò)去某種行為不該發(fā)生但卻發(fā)生了。例如：Youshouldhavegivenhermorehelp.你應(yīng)該多給她一些幫助的。（但實(shí)際沒(méi)給）Sheshouldn’thaveleftthehospitalsosoon,forshehadn’tyetrecovered.她本不該那么早就離開(kāi)醫(yī)院的，因?yàn)樗€沒(méi)有康復(fù)。（但實(shí)際離開(kāi)了）情態(tài)動(dòng)詞與完成時(shí)連用（7）oughttohavedone表示過(guò)去應(yīng)該做而沒(méi)有做的事。例如：

Heoughttohaveworkedharder.

他應(yīng)該更努力讀書(shū)的。

Yououghtnottohavebeensostupid.

你當(dāng)時(shí)不該那么笨。（8）needn’thavedone表示一種已經(jīng)做過(guò)的但并無(wú)必要的行為。例如：

Weneedn’thavetoldhimthenewsbecauseheknewalready.

我們本來(lái)沒(méi)有必要告訴他的，因?yàn)樗呀?jīng)知道了。（但卻告訴他了）注：didn’tneedtodo表示沒(méi)有必要做某事，實(shí)際上也沒(méi)有做。例如：

Ididn’tneedtocleanthewindow.Mysisterdidit.

我不必擦窗，我妹妹擦了。（我沒(méi)有擦）辨析1.can與beableto時(shí)態(tài)can:can/couldbeableto:am,is,are;was,were…ableto含義beableto=succeedindoingsth.CanyouunderstandEnglish?Twoyearslater,hewasabletospeakverygoodEnglish.辨析2.must與have

to主客觀I

don’tliketostayhereanylonger,Imustleavenow.It’stoolate,Ihavetoleavenow.時(shí)態(tài)have/has/hadto否定mustn’t禁止don’thaveto不必辨析3.would與used

to存在與否Heusedtolikefish.(現(xiàn)在不了)Hewouldlikefish.（現(xiàn)在是不是這樣，不知道）動(dòng)作or狀態(tài)would表過(guò)去發(fā)生的習(xí)慣動(dòng)作Shewouldgetupearlyatsixeveryday.usedto過(guò)去的動(dòng)作或狀態(tài)Weusedtobegoodfriends.There______beatemplehere.（usedto現(xiàn)在沒(méi)有,狀態(tài)）“過(guò)去常常”與完成時(shí)have

done的連用近義詞辨析一些提問(wèn)的答語(yǔ)固定搭配當(dāng)中的情態(tài)動(dòng)詞Mv的其他要點(diǎn)一些提問(wèn)的答語(yǔ)---CouldIborrowyourpen?---Yes,youcan.---No,I’mafraidnot.---MayIwatchTVtonight?---Yes,youmay.---No,youmaynot.No,youmustn’t.No,you’dbetternot.---Must/NeedIfinishmyhomeworknow?---Yes,youmust.---No,youneedn’t與完成時(shí)have

done的連用近義詞辨析一些提問(wèn)的答語(yǔ)固定搭配當(dāng)中的情態(tài)動(dòng)詞Mv的其他要點(diǎn)may/mightaswell=hadbettermaywell(理所當(dāng)然，完全有理由）can’thelpdoingcan’thelpbutdo(不得不，只好）can’t…without…只能Eg:YoumayaswellstayathometonightShemaywellbeproudofherson.Ican’thelpbuttellherthetruth.Ican’tlivewithoutyou固定搭配當(dāng)中的情態(tài)動(dòng)詞—IthinkI’llgiveBobaringlaterintheweek.—You_____.Youhaven’tbeenintouchwithhimforages.A.will B.may C.havetoD.shouldD練習(xí)坊I.Choosethecorrectanswer.2.John,lookatthetime._____youplaythepianoatsuchalatehour?A.MustB.Can C.May D.ShouldA3.There_____anydifficultyaboutpassingtheroadtestsinceyouhavepracticedalotinthedrivingschool.A.mustn’tbe B.shan’thaveC.shouldn’tbe D.needn’thaveC4.TheWorldWideWebissometimesjokinglycalledtheWorldWideWaitbecauseit______beveryslow.A.ShouldB.must C.will D.can5.Helen_____goonthetripwithus,butsheisn’tquitesureyet.A.shallB.must C.may D.canDC6.—Someoneisknockingatthedoor._____itbeVenis?—No,it_____beher;sheleftforNewYorkthismorning.A.Can;mustn’t B.Might;can’t C.May;doesn’t D.Can;can’tD7.Mikepromisedhisdoctorhe_____notdrink,andhehasneverdrunkeversince.A.mightB.shouldC.could D.wouldD8.—Isthereamovieoninthecinematonight?—There_____be.Iwillphonethecinemaandfinditout.A.might B.should C.can D.mustA9.WhenIwasstudyingatBeijingUniversity,I_____takeawalkalongthelakeeveryevening.A.will B.wouldC.could D.shallB10.MrBrown,manystudentswanttoseeyou._____theywaithereoroutside?A.Shall B.Will C.Can D.WouldAcan;couldWhenIwasyoungI_____climbanytreeintheforest.Learningalanguage_____bearealchallenge.couldcanII.選用正確的情態(tài)動(dòng)詞填空。may;mightIaskedifI_____gohomehalfanhourearliertoday.There____________notbeenoughmoneytopayfortherepairs.mightmay/mightwill;wouldWhenhegotolder,he_____neverdohishomework.Nancy_____keeptalkingunlessyoutellhertoshutup.wouldwillshall;shouldBynow,they______alreadybeinDubai.I_____bereplacedbysomeonefromtheNewYorkoffice.shouldshallmust;can’tYou_____havestayedup.Youlooksotired.You_____be45!Ithoughtyouwereabout25yearsold.mustcan’t在肯定句中，may的可能性比can高，may表示現(xiàn)實(shí)的可能性，can表示理論上的可能性。如：Theroadmaybeblocked.

這條路可能不通了。

Theroadcanbeblocked.

這條路可能會(huì)是不通的。

2)could的主要用法是：

A.could是can的過(guò)去式,表示與過(guò)去有關(guān)的能力和推測(cè):e.g.Weallknewthattheyoungmancouldn’tbeadoctor.B.could可以代替can表示請(qǐng)求,但語(yǔ)氣較can客氣、委婉: