八年級(jí)英語(yǔ)情態(tài)動(dòng)詞課件

情態(tài)動(dòng)詞ModalVerbsTeacher:Huangli

練習(xí)鞏固系動(dòng)詞行為動(dòng)詞動(dòng)詞種類情態(tài)動(dòng)詞助動(dòng)詞復(fù)習(xí)導(dǎo)入復(fù)習(xí)導(dǎo)入Shemissedthebusandhadtowalkhome.3.將來(lái)會(huì)越來(lái)越多的機(jī)器人。2.我現(xiàn)在得走了。她沒(méi)有趕上公共汽車，只好步行回家。

Therewillbemorerobotsinthefuture.Imustleavenow.類別意義例句行為動(dòng)詞ActionVerbs系動(dòng)詞LinkVerbs助動(dòng)詞AuxiliaryVerbs情態(tài)動(dòng)詞ModalVerbs含有實(shí)在的意義，表示動(dòng)作或狀態(tài)，在句中能獨(dú)立作謂語(yǔ)。如：putrunlaugh本身有一定的詞義，但不能獨(dú)立作謂語(yǔ)，必須與表語(yǔ)一起構(gòu)成謂語(yǔ)。如：belookget本身沒(méi)有詞義，不能獨(dú)立作謂語(yǔ)，只能和主動(dòng)詞一起構(gòu)成謂語(yǔ)動(dòng)詞，表示否定、疑問(wèn)、時(shí)態(tài)或其他語(yǔ)法形式。如：bedoesdid本身有一定的意義，但不能獨(dú)立作謂語(yǔ)，只能和主動(dòng)詞一起構(gòu)成謂語(yǔ)動(dòng)詞，表示說(shuō)話人的語(yǔ)氣和情態(tài)。情態(tài)動(dòng)詞沒(méi)有人稱和數(shù)的變化。如:canmustmayShehassomebananas.Theyeatalotofpotatoes.I’mreadinganEnglishbooknow.Hisfatherisateacher.Twinsusuallylookthesame.Theteacherbecameangry.Hedoesn’tspeakEnglish.(否定）Weareplayingbasketball.（進(jìn)行時(shí)態(tài)）Doyouhaveabrother?（疑問(wèn)）Youcankeepthemfortwoweeks.MayIsmokehere?Wemustgonew.動(dòng)詞種類返回eg：SomeofuscanspeakRussiannow,butwecouldn’tspeakit5yearsago.

Can/couldIborrowthesebooks?Ithoughtthestorycouldnotbetrue.1、can和could：表示“能力”、“許可”、“可能性”。口語(yǔ)中的可替may，而may較為正式，could可替can，使語(yǔ)氣更委婉.

2、may/might用法：might比may更客氣，語(yǔ)氣恭敬，用于正式場(chǎng)合。(1)表示認(rèn)可或征求對(duì)方許可，有“可以”之意，但用作此意時(shí)它的否定形式用maynot，但表示“不允許”、“禁止”、“阻止”等意思時(shí)用mustn’t代替：例：Youmaygonow.

MayIplaygamesinclass?No,youmustn’t.(2)還表示可能性，有“或許”、“可能”的意思eg:HemaybeEnglish,butI’mnotsure.A:MightIhaveyoure-mailaddress?B:Ofcourse./Yes,youcan.No,youcan’t./maynot.情態(tài)動(dòng)詞返回1)Must表示“必須”；“應(yīng)該”。否定式mustnot/mustn’t表示“不應(yīng)該”；“不許可”；“不準(zhǔn)”；“禁止”等。在回答帶有must的問(wèn)句時(shí)，否定式常用neednot/needn’t或don’thaveto，表示“不必”，而不用mustnot，因?yàn)閙ustnot表示“不可以”。表示推測(cè)“一定”；“必定”，只用在肯定句中。３、must用法

例句：1)Theworkmustbefinishedassoonaspossible.2)Youmustn’tspeaklikethat.3)MustIbehomebeforeeighto’clock?Yes,youmust.No,youneedn’t./No,youdon’thaveto.4.haveto用法：2)haveto表示“必須”；“不得不”。在這個(gè)意義上與must很接近，但must表示的是說(shuō)話人的主觀看法，而haveto表示的卻是客觀需要。haveto比must有更多的形式，在轉(zhuǎn)換句型時(shí)須借助助動(dòng)詞。1)Theremustbesomemistake.2)Imustgonow.3)Ihavetogonow.4)Youdon’thavetoworryaboutthat.5)Thestudentswillhavetoknowhowtousethecomputers.5.hadbetter的基本用法：固定短語(yǔ)hadbetter具有情態(tài)意義，也可以看作是情態(tài)動(dòng)詞，意為“最好”或“應(yīng)該”。沒(méi)有人稱和數(shù)的變發(fā)，后常跟動(dòng)詞原形，是提出建議的一種方式。其簡(jiǎn)略’dbetter,否定式為hadbetternot.如：Youhadbettergotoseeadoctor.你最好去看醫(yī)生。You’dbettereatmorefruitanddrinkmorewater.你最好多吃水果，多喝水。You’dbetternoteatice-cream.你最好別吃冰激凌。5.Shall和should的基本用法：1）shall的用法：表征詢意見(jiàn)，主要用于第一人稱的疑問(wèn)句中。如：ShallItakeyoutothehospital?

要不要我?guī)闳メt(yī)院?

Whatshallwedothisweekend?這個(gè)周末我們要做什么呢？

2)Should的用法:a.表義務(wù)。如：Weshouldsavewater.我們應(yīng)該節(jié)約用水。Weshouldprotecttheenvironment.我們應(yīng)該保護(hù)環(huán)境。表提出或征詢建議。如：Youshouldgotoseeadoctor.你應(yīng)當(dāng)去看醫(yī)生。ShouldIstophimfromplaycomputergames?我該阻止他打電腦游戲嗎？6.need的基本用法：表必要性，多用于疑問(wèn)句，否定句或否定意味的句子中。如：Youneedn’thurry.你不必著急。----NeedIrepeatit？需要我重復(fù)嗎？----No,youneedn’t.不，不必了。情態(tài)動(dòng)詞

特點(diǎn)：情態(tài)動(dòng)詞表示說(shuō)話人對(duì)某一動(dòng)作或狀態(tài)的態(tài)度，認(rèn)為“可能”、“應(yīng)當(dāng)”、“必要”等，但本身詞義不完全，不能單獨(dú)作謂語(yǔ)動(dòng)詞，必須和不帶“to”的動(dòng)詞不定式（即動(dòng)詞原形）連用。情態(tài)動(dòng)詞沒(méi)有人稱和數(shù)的變化。朗讀時(shí)，情態(tài)動(dòng)詞的肯定式一般不重讀，有些情態(tài)動(dòng)詞沒(méi)有過(guò)去式，如must;有些有過(guò)去式，如：can—could,may—might,haveto–hadto等。情態(tài)動(dòng)詞的否定式一般是在它們的后面加否定詞構(gòu)成，但haveto需借助動(dòng)詞does、do、didnot。情態(tài)動(dòng)詞否定式否定式簡(jiǎn)略形式cancouldmaymightmustshallshouldwillwouldneedcannotcouldnotmaynotmightnotmustnotshallnotshouldnotwillnotwouldnotneednotcan’t/ka：nt/couldn’t

/'kudnt/mayn’t

/'meint/mightn’t

/'maitnt/mustn’t

/msnt/shan’t

/a:nt/shouldn’t

/udnt/won’t

/wunt/wouldn’t/'wudnt/needn’t

/'ni:dnt/1.______（May/Can)Itakethenewspaperaway?------No,youmustn’t.You______(must/can)readitonlyhere.

2.______(Can/Need)yousingthesong?Yes,I____(can’t/mustn’t).butIt____(is/was)twoyearsago.3.MustIreturnthebookatonce?No,you_______(mustn’t/needn’t).butyou____(must/can)returnitafterschool.鞏固練習(xí)MaycanCan

can’tmustn’tcanwasMymotherisout,soI____(must/haveto)lookaftermylittlesister.

5.Marywasnotinherbedroomyesterdayafternoon.She____________(musthavebeen/shouldhavebeen)inherclassroom.

6.Bobsaidhewasgoingtojoinourclubbuthedidn't.He________________(musthavechanged/can'thavechanged)hismind.

mustmusthavebeenmusthavechangedPlaygameAttention:用回答問(wèn)題的方式進(jìn)行游戲（小組為單位），滿分10分?；卮饐?wèn)題時(shí)積極舉手（短樂(lè)曲為時(shí)限）答問(wèn)題的同學(xué)加一分（每小組）。回答問(wèn)題時(shí)正確的答案另加一分；錯(cuò)誤答案扣一分。本游戲大約5—10分鐘左右，。5.分?jǐn)?shù)高的組勝并得小禮物一份；分?jǐn)?shù)低的組輸，并派出一人表演節(jié)目。1.—Thatmustbeamistake.

—No,it______.I’vedoneitmanytimes.

A.maynotbe B.needn’tbe C.can’tbe D.wouldn’tbe2.You____listentotheteachercarefullyinclass.

A.haveto B.must C.need D.may3.—Doyouhavetoleavenow?

—Sorry,butIreally_____.

A.can’t B.must C.have D.should

4.It___beverydifficulttolearnEnglishwell,isn’tit?

A.need B.hasto C.must D.shouldC.ACCRaceAttention:用搶答問(wèn)題的方式進(jìn)行游戲（個(gè)人為單位），滿分10分?；卮饐?wèn)題時(shí)積極舉手（短樂(lè)曲為時(shí)限）答問(wèn)題的同學(xué)加一分?；卮饐?wèn)題時(shí)正確的答案另加一分；錯(cuò)誤答案扣一分。本游戲大約5分鐘左右。5.分?jǐn)?shù)高的人勝得紅星和獎(jiǎng)品一份；分?jǐn)?shù)低的人輸，輸?shù)娜艘笳f(shuō)出當(dāng)天復(fù)習(xí)過(guò)的一點(diǎn)語(yǔ)法點(diǎn)來(lái)。1.John____beathomebecausehehasjustphonedmefromanearbytown.

A.mustn’t B.isnotabletoC.can’t D.maynot2.Thereissomeoneknockingatthedoor,who____itbe?

A.can B.may C.must D.need3.—______wegonow,Mike?—Sure.Let’sgo.

A.Will B.Shall C.Do D.Are4.____Iaskyourname,please?

A.Will B.Shall C.May D.MustCABC5.Ishall____helphimasmuchaspossible.

A.must B.haveto C.can D.may6.You____toschooltomorrowifyougotolookafterourmotherinthehospital.

A.don’t’needcome B.won’tneedcome

C.needn’ttocome D.needn’tcome7.—NeedIgohomenow?—_______.

A.Yes,youneed B.Yes,youmust C.No,youmustn’t D.No,youmaynotBDB專題訓(xùn)練：情態(tài)動(dòng)詞選擇填空

8.Sheworkedhardand____passhisexam.

A.could B.wasabletoC.can D.couldableto9.—CouldIborrowyourpen?—Yes,you_____.

A.could B.can C.wereableD.may10.______youlendmeyourbike?

A.May B.Can C.Mustn’t D.Do11.Yourmotherisill,andyou____homeearly.

A.needtogo B.needto C.needn’ttogo D.don’tneedgo12.Thereisnoschooltomorrow,soyou_____come.

A.maynotB.needn’t C.mustn’t D.can’t13.Thelastbushasjustleft.I’mafraidyou____walkhome.

A.can B.mayC.must D.havetoBBBABD14.—I’msorryIdidn’twinintherace.—Badluck!Well,you___wineverytime.

A.can’t B.must C.should D.mustn’t15.—Doyouhavetotakecareofyourmotherathome?—Yes,I______.

A.do B.haveto C.have D.shall16.Thiskindofcar____runveryfast.It’snew.

A.can B.isableto C.could D.hasto17.Cars____parked(?？?infrontofthishouse.

A.mustn’tbe B.can’tbe C.maynotbe D.needbe18.Itwasraininghard.You____goout.

A.hadbetternot B.hadbetternottoC.hadn’tbetterD.hadbettertonot

AAAAASumup:情態(tài)動(dòng)詞否定式否定式簡(jiǎn)