高中英語情態(tài)動詞課件

語法專題情態(tài)動詞的用法情態(tài)動詞的根本用法特點1〕情態(tài)動詞后面只能接動詞原型，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。

2〕情態(tài)動詞沒有非謂語形式，即沒有不定式，分詞，等形式。高中階段都學(xué)過哪些情態(tài)動詞呢1can/could/beableto2may/might3must/haveto4shall/should5will/would6need/dare7oughtto8情態(tài)動詞+havedone1can/could/beableto1Weallcanusecomputersnow.〔表能力〕2Itwillbesunnyinthedaytime,butitcanrainlateronthisevening〔表可能性〕3---CanIgonow?yes,youcan.(表請求和允許)4Couldyouwaitafewdaysforthemoney?〔表請求〕5Canthisnewsbetrue?Itcan'tbeourheadmaster.hehasgonetoBeijing.〔表推測，主要用于否認和疑問〕*beableto

能用于各種時態(tài)。

can/could

只能表示現(xiàn)在或過去的能力。*was/wereableto:“設(shè)法做成某事”

相當(dāng)于managedtodosth.succeededindoingsth.。1.can與beableto有何區(qū)別？1.Acomputer______thinkforitself;itmustbetoldwhattodo.A.can’tB.couldn’tC.maynotD.mightnot2.Thefirespreadthroughthehotelveryquicklybuteveryone______getout.A.hadtoB.wouldC.couldD.wasabletoAD3.Theywill______runthismachineontheirowninthreemonths.A.canB.couldC.mayD.beabletoD2may/might1MayIwatchTvaftersupper?Yesyoumay/No,youmustn't.〔請求許可)2Itmaybetrue.Hemighthavesomefever〔推測〕3Mayyousucceed!Mayyouhavemanymoredaysashappyasthisone〔祝愿〕may/mightaswell+dosth

還是做…好,最好做…wemayaswellstaywhereweare表推測時，might可能性最小。5.—CouldIborrowyourdictionary?—Yes,ofcourseyou_______.A.mightB.willC.canD.should6.—MightIwatchTVaftersupper?—Yes,you________.A.mayB.mustC.mightD.doCA3must與haveto的用法Youmustn’twastetime〔表禁止〕MustIcomebackbeforeten?〔表必須〕Yes,youmust.No,youneedn't./don'thaveto3)〔表推測“一定”)Youmustbehungryafteralongwalk.4)

must還有“偏偏，一定要”的意思whymustyoumakesomuchnoisewhileothersaresleeping?區(qū)別：Ireallymustgonow.〔必須，主觀上〕Ihavetogonow,becausemymotherisinhospital.(不得不，客觀上〕Hemustbereading,____he?Youmustdoityourself,____you?Hemusthavegoneoverthearticle,______he?Itmusthaverainedlastnight,_____it?5〕must表推測語氣反意疑問句isn’tdon’thasn’tdidn’t7.You______returnthebooknow.Youcankeepittillnextweekifyoulike.A.can’tB.mustn’tC.needn’tD.maynot8.Johnny,you______playwiththeknife,you______hurtyourself.A.won’t;can’tB.mustn’t;mayC.shouldn’t;mustD.can’t;shouldn’tCB9.--Willyoustayforlunch?--Sorry,_____.Mybrotheriscomingtoseeme.A.Imustn’tB.Ican’tC.Ineedn’tD.Iwon’t10.--MayIpickaflowerinthegarden?--________.A.No,youneedn’tB.Not,please.C.No,youmustn’tD.No,youwon’tBC4shall與should1〕shall用于1,3人稱疑問句表示征求對方的意見

Shallthedriverwait?Whatshallwedonext?2〕shall用于2,3人稱陳述句表示命令,警告，允諾，威脅以及法律條文規(guī)定.YoushallgowithmeHeshallbepunishedYoushallhavethebookwhenIfinishit.Allthechildrenshallgotoschoolattheageofseven.3〕should表示勸告和建議Youshouldstudyhard.4〕should表推測Theyshouldhavearrivedbytwoo'clock5〕should用于if條件句表示萬一AskTomtoringmeupifyoushouldseehim.ShoudIbefreetomorrow,Iwillcome.6〕should表竟然Idon'tknowwhyyoushouldbesorudetoyourmother1.Tom’sfatherpromised,“You___haveanewcomputerifyoupassthecomingexamination,”A.canB.shouldC.shallD.mayC

2.------WhencanIcomeforthephotos?Ineedthemtomorrowafternoon.-----They_____bereadyby12:00.A.canB.shouldC.mightD.needB

5will與would的用法1表示意志和意愿〔時態(tài)不同〕Iwillneverdoitagain.Theysaidthattheywouldhelpus.2表請求，建議〔would語氣更婉轉(zhuǎn)〕Willyoupleasetakeamessageforme?Wouldyoupleasepasshimthebook?3表功能,一種傾向性。Thismachinewon’twork.Thedoorwon’topen.4表示習(xí)慣性動作與usedto有何區(qū)別？Fishwilldiewithoutwater.Everyevening,hewouldsitbythewindow.6need語dare的用法既可做實意動詞又可做情態(tài)動詞。做情態(tài)動詞用于否認和疑問句而做實意動詞可用于肯定，否認,疑問句中。Howdareyousaysuchathing?Howdareyoutosaysuchathing?Hedaren’ttospeakEnglishbeforesuchacrowd,didhe?Hedaren’tspeakEnglishbeforesuchacrowd,darehe?11.She_____outaloneatnight.A.darenottogoB.daresnotgoC.doesn’tdaretogoD.doesn’tdaresgoC7oughtto的用法1表應(yīng)該與should的區(qū)別：客觀事實和主觀看法Yououghttotakecareofhim.Youarehisfather.Yououghttogethimtoreceivegoodeducation2表推測〔不如must語氣強〕Heoughttobehomebynow.Hemustbehomebynow.8.情態(tài)動詞+完成時表對過去的推測1〕musthavedone〔僅用于肯定句)“一定已經(jīng)”2〕can’t/couldn’thavedone(用于否認疑問句〕3〕mayhavedone〔肯定，否認均可)mighthavedone〔肯定，否認均可)4〕shouldhavedoneshouldn’thavedonecouldhavedonewouldhavedoneneedn'thavedone5〕wouldratherhavedonehadbetterhavedone12.Jenny____withhimatthattime,forIwashavingdinnerwithherinmyhome.A.can’thavebeenB.mustn’thavebeenC.mustbeD.maybe

A13.TheyaredisappointedattheEnglishparty.Theysaythatit___betterorganized.A.hadbeenB.hadtobeC.musthavebeenD.couldhavebeenD14.----Didyouwalkedhomebyyourselflastnight?----Yes,Idid.ButIthinkI_____.A.needn’tB.shouldn’tC.maynothaveD.needn’thaveD15.We______las