高中情態(tài)動(dòng)詞用法課件

Grammar__________Grammar__________1Firstwealthishealth.Q1:Whatshould/shouldn’twedotokeephealthy?Q2:Whatkindoffoodmustweeattobestrong?Q3:Whatoughtwetoeattostayslim?Firstwealthisheal2主要情態(tài)動(dòng)詞Can,couldMay,mightMust/havetoNeedDareWill/wouldShall/should/oughtto

Whatmodalverbshaveyoulearned?主要情態(tài)動(dòng)詞Can,couldWhatmodalve31.情態(tài)動(dòng)詞有一定的意義，只表示期待或估計(jì)某事的發(fā)生，不能表示正在發(fā)生或已經(jīng)發(fā)生的事情。2.沒(méi)有人稱(chēng)和數(shù)的變化，即情態(tài)動(dòng)詞第三人稱(chēng)單數(shù)不加-s。3.不能獨(dú)立使用，它和后面的動(dòng)詞構(gòu)成謂語(yǔ)。4.情態(tài)動(dòng)詞

除ought

和have

外，后面只能接動(dòng)詞原形5.

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。

只作情態(tài)動(dòng)詞的can/could,may/might,oughtto,must可情態(tài)可實(shí)義的need,dare可情態(tài)可助動(dòng)詞的shall/should,will/would相當(dāng)于情態(tài)動(dòng)詞的haveto情態(tài)動(dòng)詞的語(yǔ)法特征1.情態(tài)動(dòng)詞有一定的意義，只表示期待或估計(jì)某事的發(fā)生，不能4情態(tài)動(dòng)詞含義否定式注意點(diǎn)must表必要“必須”needn’t“不必”(區(qū)別

haveto)有時(shí)表“偏要”表推測(cè)“一定”can’t“不可能”只能用于肯定句，不能用于否定、疑問(wèn)句1.must&need&haveto情態(tài)動(dòng)詞含義否定式注意點(diǎn)表必要needn’t(區(qū)別hav5

注意：1)must表示推測(cè)時(shí)，只能用于肯定句。mustdo對(duì)一般時(shí)的肯定推測(cè)musthavedone對(duì)過(guò)去發(fā)生的事情作出的肯定判斷mustbedoing

對(duì)現(xiàn)在的動(dòng)作進(jìn)行肯定推測(cè)e.g.他們買(mǎi)了一輛新車(chē)。他們一定很有錢(qián)Theyhaveboughtanewcar.Theymusthavealotofmoney.他現(xiàn)在一定在看小說(shuō)Hemustbereadingnovelsnow.路是濕的。昨天晚上一定下雨了。Theroadiswet.Itmusthaverainedlastnight.注意：mustdo6---Need

hestartfromthebeginning?---Yes,hemust.---No,heneedn’t/doesn’thaveto.

1.作情態(tài)動(dòng)詞時(shí),僅用于否定或疑問(wèn)句,后接動(dòng)詞原形,表“需要”2)needYouneedn’treturnthebooknow.2.needn’thavedone表示做了本不必要做的事情,意為“本不必要…”O(jiān)urcolorTVsetisstillgoodenough.Youneedn’thaveboughtanewone.3.作實(shí)義動(dòng)詞時(shí),表示“需要”，有人稱(chēng)、時(shí)態(tài)、和數(shù)的變化Heneedstofinishitthisevening.Theclassroomneedscleaning.---Needhestartfromthebeg74注意對(duì)need問(wèn)句的回答:--NeedIfinishtheworktoday?--Yes,________________.No,________________.No,________________.youmustyouneedn’tyoudon’thavetoneedn’t對(duì)其它情態(tài)動(dòng)詞的回答:--ShallItellJohnaboutit?--No,you__________.--No,you__________.

--Mustwedoitnow?--No,you__________.--No,you__________.needn’tdon’thavetoneedn’tdon’thaveto4注意對(duì)need問(wèn)句的回答:youmustyounee8情態(tài)動(dòng)詞含義否定式注意點(diǎn)can/could表能力“能/會(huì)”can’t“不會(huì)，不能”區(qū)別

beableto表許可“可以”can’t“不可以，不許”代替may表推測(cè)“可能”can’t“不可能”主要用于否定/疑問(wèn)句中1表示某人通過(guò)努力克服困難做成某事,要用was/wereableto.2could,might,would表委婉語(yǔ)氣用于疑問(wèn)句,答語(yǔ)仍須用can,may,will.3can用于肯定句中,可表示”有時(shí)可能”2.can/could

情態(tài)動(dòng)詞含義否定式注意點(diǎn)表能力can’t區(qū)別94.can/couldhavedone“本可以，本可能做某事”用于肯定句中，表示對(duì)過(guò)去發(fā)生的事情做出的判斷。你本來(lái)可以考的更好。Youcouldhavehadabettermark.5.can/couldnothavedone

對(duì)過(guò)去發(fā)生行為進(jìn)行推測(cè):不可能做某事1)剛才我還看見(jiàn)他了，所以他不可能出國(guó)的。Isawhimjustnowsohecouldn’thavegoneabroad.2)門(mén)是鎖著的，所以她不可能在家。Thedoorwaslocked，soshecouldn’thavebeen

athome.

4.can/couldhavedone“本可以，本可10情態(tài)動(dòng)詞含義否定式注意點(diǎn)may/might表許可“可以”mustn’t“不許，嚴(yán)禁”口語(yǔ)中也可用can’t表推測(cè)“可能”can’t“不可能”主要用于肯定句，不能用在疑問(wèn)句

（maynot可能不）3.may/might情態(tài)動(dòng)詞含義否定式注意點(diǎn)表許可mus11注意：might/mayhavedone,表示對(duì)過(guò)去發(fā)生的動(dòng)作進(jìn)行可能性推測(cè)，1）他可能去醫(yī)務(wù)室了。Hemayhavegonetotheclinic.2）他可能已經(jīng)從報(bào)紙上知道這個(gè)消息了。Hemighthavereadaboutthenewsinthenewspaper.注意：1）他可能去醫(yī)務(wù)室了。Hemayhavegone121.---MayIuseyourpencil?---Yes,youmay./No,youmustn’t.2.Shemaynotbeworkingnow.3.Johnmightbeathomenow.4.Helenmaygoonthetripwithus,butsheisn’tverysureyet.5.Shemay/mighthavereaditinthepaper.6.Hemaynothavefinishedreadingthebook.1.---MayIuseyourpencil?2.13情態(tài)動(dòng)詞用法will表請(qǐng)求(第二人稱(chēng))表意志,意愿表某種傾向或習(xí)慣would更客氣的請(qǐng)求過(guò)去的意志（愿）過(guò)去的傾向或習(xí)慣4.will/would情態(tài)動(dòng)詞用法wi14情態(tài)動(dòng)詞用法shall征求對(duì)方意見(jiàn)(第一,三人稱(chēng))表示命令,警告,威脅或允諾(第二,三人稱(chēng))should/oughtto表示勸告,建議,命令或責(zé)任“應(yīng)該,必須”表示推測(cè),

“理應(yīng),估計(jì),大概,可望”should還可表示“竟然”5.shall,should和oughtto情態(tài)動(dòng)詞用法shall15YoushalldoasIsay.(命令)1.在陳述句中,shall用于二、三人稱(chēng)表示允諾、警告、命令、決心等。ShallIopenthewindowforyou？（征求意見(jiàn)）2.在疑問(wèn)句中,用于一、三人稱(chēng)，用來(lái)表示請(qǐng)求或征求意見(jiàn)。注意：Tellhimthatheshallhavethebooktomorrow.(允諾)Nothingshall

stopmedoingit.(決心)

Shallhefetchsomewaterforyou？（請(qǐng)求）YoushalldoasIsay.(命令)1.16Youngpeopleshouldlearnhowtousecomputers.3.should常表示勸告、建議、命令，與oughtto意義相近，但oughtto多表示責(zé)任、義務(wù)，語(yǔ)氣強(qiáng)烈。Everycitizenoughttoobeylaw.Yououghtnottogo.Youshould/oughttohavetoldherthetruthearlier.Sheshouldn’thaveleftwithoutsayingaword.4.should/oughttohavedone表示責(zé)備或批評(píng),意為“本應(yīng)該…但”,oughtto的語(yǔ)氣更強(qiáng)烈,用于否定則表示“本不該…但”5.Should用于可能性推測(cè)時(shí),表“應(yīng)該，很可能”Theyleftat5:30.Theyshouldgettherenow.Youngpeopleshouldlearnhow171.作為情態(tài)動(dòng)詞用，常用在否定句和疑問(wèn)句中。Dare(need)+S+VS+daren’t(needn’t)+VIdaren’twalkthroughtheforestatnight.Dareyouwalkthroughtheforestatnight?Youneedn’treturnthebooknow.Needhegoyesterday?6.可兼做行為動(dòng)詞的情態(tài)動(dòng)詞：need、dare

1.作為情態(tài)動(dòng)詞用，常用在否定句和疑問(wèn)句中。Dare(ne18判斷正誤:

Howdareyousaysuchathing?Howdareyoutosaysuchathing?Hedaren’ttospeakEnglishbeforesuchacrowd,didhe?Hedaren’tspeakEnglishbeforesuchacrowd,darehe?判斷正誤:Howdareyousay19Nobodyneedtobeafraidofcatchingthedisease.Nobodyneedbeafraidofcatchingthedisease.Nobodyneedtobeafraidofca202.作實(shí)義動(dòng)詞用，常用在肯定句中,

有人稱(chēng)、時(shí)態(tài)、和數(shù)的變化Heneedstogotherehimself.Hehasgrownup,sowedon’tneedtoworryabouthim.

3.Sth(sb)need(want,request)+doing/tobedoneThehouseneedscleaning/tobecleanedTheboyneedssendingtothehospitalatonce.2.作實(shí)義動(dòng)詞用，常用在肯定句中,有人稱(chēng)、時(shí)態(tài)、和數(shù)的變化21表示推測(cè)——情態(tài)動(dòng)詞的重要用法肯定的推測(cè)可能的推測(cè)否定的推測(cè)疑問(wèn)的推測(cè)must

對(duì)將來(lái)

對(duì)現(xiàn)在

對(duì)過(guò)去情態(tài)動(dòng)詞may,might

can’t,couldn’tcan,could

+V.

+V.+havedone常見(jiàn)mustbe+bedoing

+V.+V.+havedone+bedoing

可以用not表示“可能不”

+V.+V.+havedone+bedoing+V.+V.+havedone+bedoing表示推測(cè)——情態(tài)動(dòng)詞的重要用法肯定的推測(cè)must22ExercisesExercises23I.Trytoexplainthemeaningsofthemodalverbsinthefollowingsentences.1.HecanspeakEnglishwell.2.Youcangohomenow.3.Thatcan’tbetrue.4.CouldyoupleaseshowmethewaytoBeihaiPark?5.Theyhuntersarelost.Theycouldstarve.6.MayIcomein?7.Hemaygiveyousomehelp?abilitypermissionguessingrequestpossibilitypermissionpossibilityI.Trytoexplainthemeanings248.Don’tworry.Iwillhelpyou.9.Oftenhewoulddressuplikearichman.10.Wouldyouliketojoinusfordinner?YoushallhavetheticketassoonasIgetit.Youshouldarriveattheairporttwohoursbeforehegoes.Itisfiveo’clock.Heshouldturnupsoon.WangFengwinsanawardeveryyear.Hmisepasthabitrequestpromisepredictionadviceguessing8.Don’tworry.Iwillhelpyou252.用情態(tài)動(dòng)詞完成句子1).You’vebeenworkingallday.You______beverytired.2).(Thedoorbellrings)Iwonderwhothatis.It______beLisa.She’sstillinthelibraryatthistime.3).Itisalongtimesincewemetlasttime.You______comeandseeusmoreoften.

mustcan’tshould2.用情態(tài)動(dòng)詞完成句子mustcan’tshould264.Ihaven’tdecidedwhereI’mgoingformyholidays.I_____gotoAustralia.5.Myfather’sbirthdayisccoming.What_____Igivehim?6.Whydon’tyoutryonthisdress?It_____lookniceonyou.mayshallwill4.Ihaven’tdecidedwhereI’m277.“Whowasthemantalkingwithyourteacher?”“I’mnotsure.It______beherbrother.”8.Idon’tknowwhentheguests_____be

here.They______arriveatanytime.mightwillcould7.“Whowasthemantalkingwi283.完成下列句子：

1.Idon’tknowwheresheis,she_______________.

(可能在武漢）(be)2.Atthismoment,ourteacher_______________（想必在批改）ourexampapers.(mark/grade)3.Theroadiswet.It________________(一定下雨了）

lastnight.(rain)

4.Yourmother_____________________________（一定一直在找你）(look)maybeinWuhangradingmustbemarking

musthaverainedmusthavebeenlookingforyou.3.完成下列句子：maybeinWuhan295.Philip________________________seriouslyinthecaraccident.(可能受了重傷).(hurt)6.---Lindahasgonetowork,butherbicycleisstillhere.--She___________________(可能走了)bybus.(go)7.Mike________________(一定還沒(méi)有找回)hiscar,forhecametoworkbybusthismorning.

may(might)havebeenhurtmay(might)havegonecan’thavefound4.Multiple-choice5.Philip____________________301.—Isn’tthatAnn’shusbandoverthere?—No,it________behim.I’msurehedoesn’twearglasses.(04全國(guó)I29)A.can’t B.mustnotC.won’tD.maynot2.—I’lltellMaryabouthernewjobtomorrow.—You________herlastweek.(04福建32)

A.oughttotell

B.wouldhavetold

C.musttell

D.shouldhavetold3.Ioftenseelightsinthatemptyhouse.DoyouthinkI________reportittothepolice?(04廣西21)A.shouldB.may C.will D.can4.Mr.White________at8:30forthemeeting,buthedidn’t

showup.(04廣西27)A.shouldhavearrived B.shouldarriveC.shouldhavehadarrived D.shouldbearriving5.—Excuseme.IsthistherightwaytotheSummerPalace?—Sorry,Iamnotsure.Butit________be.(04湖北26)A.might B.willC.must D.can√√√√√1.—Isn’tthatAnn’shusbando316.—Excuseme,butIwanttouseyourcomputertotypeareport.

—You________havemycomputerifyoudon'ttakecareofit.(04湖南28)A.shan'tB.mightnotC.needn'tD.shouldn't7.—Idon'tmindtellingyouwhatIknow.—You________.I'mnotaskingyouforit.(04江蘇22)A.mustn'tB.maynotC.can'tD.needn’t8.—Mum,I’vebeenstudyingEnglishsince8o’clock.________IgooutandplaywithTomforawhile?—No,I’mafraidnot.Besides,it’srainingoutsidenow.(04遼寧29)A.Can’t B.Wouldn’t C.Maynot D.Won’t9.You________betired—you'veonlybeenworkingforanhour.(04全國(guó)II29)A.mustnotB.won'tC.can'tD.maynot10.Childrenunder12yearsofageinthatcountry________beunderadultsupervisionwheninapubliclibrary.(04上海28)A.must B.may C.canD.need√√√√√6.—Excuseme,butIwanttou3211.—Whoisthegirlstandingoverthere?

—Well,ifyou________know,hernameisMabel.(04天津31)A.mayB.canC.must D.shall12.I________payTracyavisit,butIamnotsurewhetherIwillhavetimethisSunday.(04浙江26)A.shouldB.mightC.wouldD.could13.“Theinterest

________

bedividedintofiveparts,accordingtotheagreementmadebybothsides,”declaredthejudge.(04重慶24)A.may

B.should

C.must

D.shall14.Hepaidforaseat,whenhe________haveenteredfree.(05年山東34)A.couldB.wouldC.mustD.need15.He________havecompletedhiswork;otherwise,hewouldn’tbeenjoyinghimselfbytheseaside.(05年北京26)A.shouldB.mustC.wouldn’tD.can’t√√√√√11.—Whoisthegirlstanding33經(jīng)常不斷地學(xué)習(xí),你就什么都知道。你知道得越多,你就越有力量StudyConstantly,AndYouWillKnowEverything.TheMoreYouKnow,TheMorePowerfulYouWillBe寫(xiě)在最后經(jīng)常不斷地學(xué)習(xí),你就什么都知道。你知道得越多,你就越有力量寫(xiě)34感謝聆聽(tīng)不足之處請(qǐng)大家批評(píng)指導(dǎo)PleaseCriticizeAndGuideTheShortcomings結(jié)束語(yǔ)講師：XXXXXXXX年XX月XX日

感謝聆聽(tīng)結(jié)束語(yǔ)講師：XXXXXX35Grammar__________Grammar__________36Firstwealthishealth.Q1:Whatshould/shouldn’twedotokeephealthy?Q2:Whatkindoffoodmustweeattobestrong?Q3:Whatoughtwetoeattostayslim?Firstwealthisheal37主要情態(tài)動(dòng)詞Can,couldMay,mightMust/havetoNeedDareWill/wouldShall/should/oughtto

Whatmodalverbshaveyoulearned?主要情態(tài)動(dòng)詞Can,couldWhatmodalve381.情態(tài)動(dòng)詞有一定的意義，只表示期待或估計(jì)某事的發(fā)生，不能表示正在發(fā)生或已經(jīng)發(fā)生的事情。2.沒(méi)有人稱(chēng)和數(shù)的變化，即情態(tài)動(dòng)詞第三人稱(chēng)單數(shù)不加-s。3.不能獨(dú)立使用，它和后面的動(dòng)詞構(gòu)成謂語(yǔ)。4.情態(tài)動(dòng)詞

除ought

和have

外，后面只能接動(dòng)詞原形5.

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。

只作情態(tài)動(dòng)詞的can/could,may/might,oughtto,must可情態(tài)可實(shí)義的need,dare可情態(tài)可助動(dòng)詞的shall/should,will/would相當(dāng)于情態(tài)動(dòng)詞的haveto情態(tài)動(dòng)詞的語(yǔ)法特征1.情態(tài)動(dòng)詞有一定的意義，只表示期待或估計(jì)某事的發(fā)生，不能39情態(tài)動(dòng)詞含義否定式注意點(diǎn)must表必要“必須”needn’t“不必”(區(qū)別

haveto)有時(shí)表“偏要”表推測(cè)“一定”can’t“不可能”只能用于肯定句，不能用于否定、疑問(wèn)句1.must&need&haveto情態(tài)動(dòng)詞含義否定式注意點(diǎn)表必要needn’t(區(qū)別hav40

注意：1)must表示推測(cè)時(shí)，只能用于肯定句。mustdo對(duì)一般時(shí)的肯定推測(cè)musthavedone對(duì)過(guò)去發(fā)生的事情作出的肯定判斷mustbedoing

對(duì)現(xiàn)在的動(dòng)作進(jìn)行肯定推測(cè)e.g.他們買(mǎi)了一輛新車(chē)。他們一定很有錢(qián)Theyhaveboughtanewcar.Theymusthavealotofmoney.他現(xiàn)在一定在看小說(shuō)Hemustbereadingnovelsnow.路是濕的。昨天晚上一定下雨了。Theroadiswet.Itmusthaverainedlastnight.注意：mustdo41---Need

hestartfromthebeginning?---Yes,hemust.---No,heneedn’t/doesn’thaveto.

1.作情態(tài)動(dòng)詞時(shí),僅用于否定或疑問(wèn)句,后接動(dòng)詞原形,表“需要”2)needYouneedn’treturnthebooknow.2.needn’thavedone表示做了本不必要做的事情,意為“本不必要…”O(jiān)urcolorTVsetisstillgoodenough.Youneedn’thaveboughtanewone.3.作實(shí)義動(dòng)詞時(shí),表示“需要”，有人稱(chēng)、時(shí)態(tài)、和數(shù)的變化Heneedstofinishitthisevening.Theclassroomneedscleaning.---Needhestartfromthebeg424注意對(duì)need問(wèn)句的回答:--NeedIfinishtheworktoday?--Yes,________________.No,________________.No,________________.youmustyouneedn’tyoudon’thavetoneedn’t對(duì)其它情態(tài)動(dòng)詞的回答:--ShallItellJohnaboutit?--No,you__________.--No,you__________.

--Mustwedoitnow?--No,you__________.--No,you__________.needn’tdon’thavetoneedn’tdon’thaveto4注意對(duì)need問(wèn)句的回答:youmustyounee43情態(tài)動(dòng)詞含義否定式注意點(diǎn)can/could表能力“能/會(huì)”can’t“不會(huì)，不能”區(qū)別

beableto表許可“可以”can’t“不可以，不許”代替may表推測(cè)“可能”can’t“不可能”主要用于否定/疑問(wèn)句中1表示某人通過(guò)努力克服困難做成某事,要用was/wereableto.2could,might,would表委婉語(yǔ)氣用于疑問(wèn)句,答語(yǔ)仍須用can,may,will.3can用于肯定句中,可表示”有時(shí)可能”2.can/could

情態(tài)動(dòng)詞含義否定式注意點(diǎn)表能力can’t區(qū)別444.can/couldhavedone“本可以，本可能做某事”用于肯定句中，表示對(duì)過(guò)去發(fā)生的事情做出的判斷。你本來(lái)可以考的更好。Youcouldhavehadabettermark.5.can/couldnothavedone

對(duì)過(guò)去發(fā)生行為進(jìn)行推測(cè):不可能做某事1)剛才我還看見(jiàn)他了，所以他不可能出國(guó)的。Isawhimjustnowsohecouldn’thavegoneabroad.2)門(mén)是鎖著的，所以她不可能在家。Thedoorwaslocked，soshecouldn’thavebeen

athome.

4.can/couldhavedone“本可以，本可45情態(tài)動(dòng)詞含義否定式注意點(diǎn)may/might表許可“可以”mustn’t“不許，嚴(yán)禁”口語(yǔ)中也可用can’t表推測(cè)“可能”can’t“不可能”主要用于肯定句，不能用在疑問(wèn)句

（maynot可能不）3.may/might情態(tài)動(dòng)詞含義否定式注意點(diǎn)表許可mus46注意：might/mayhavedone,表示對(duì)過(guò)去發(fā)生的動(dòng)作進(jìn)行可能性推測(cè)，1）他可能去醫(yī)務(wù)室了。Hemayhavegonetotheclinic.2）他可能已經(jīng)從報(bào)紙上知道這個(gè)消息了。Hemighthavereadaboutthenewsinthenewspaper.注意：1）他可能去醫(yī)務(wù)室了。Hemayhavegone471.---MayIuseyourpencil?---Yes,youmay./No,youmustn’t.2.Shemaynotbeworkingnow.3.Johnmightbeathomenow.4.Helenmaygoonthetripwithus,butsheisn’tverysureyet.5.Shemay/mighthavereaditinthepaper.6.Hemaynothavefinishedreadingthebook.1.---MayIuseyourpencil?2.48情態(tài)動(dòng)詞用法will表請(qǐng)求(第二人稱(chēng))表意志,意愿表某種傾向或習(xí)慣would更客氣的請(qǐng)求過(guò)去的意志（愿）過(guò)去的傾向或習(xí)慣4.will/would情態(tài)動(dòng)詞用法wi49情態(tài)動(dòng)詞用法shall征求對(duì)方意見(jiàn)(第一,三人稱(chēng))表示命令,警告,威脅或允諾(第二,三人稱(chēng))should/oughtto表示勸告,建議,命令或責(zé)任“應(yīng)該,必須”表示推測(cè),

“理應(yīng),估計(jì),大概,可望”should還可表示“竟然”5.shall,should和oughtto情態(tài)動(dòng)詞用法shall50YoushalldoasIsay.(命令)1.在陳述句中,shall用于二、三人稱(chēng)表示允諾、警告、命令、決心等。ShallIopenthewindowforyou？（征求意見(jiàn)）2.在疑問(wèn)句中,用于一、三人稱(chēng)，用來(lái)表示請(qǐng)求或征求意見(jiàn)。注意：Tellhimthatheshallhavethebooktomorrow.(允諾)Nothingshall

stopmedoingit.(決心)

Shallhefetchsomewaterforyou？（請(qǐng)求）YoushalldoasIsay.(命令)1.51Youngpeopleshouldlearnhowtousecomputers.3.should常表示勸告、建議、命令，與oughtto意義相近，但oughtto多表示責(zé)任、義務(wù)，語(yǔ)氣強(qiáng)烈。Everycitizenoughttoobeylaw.Yououghtnottogo.Youshould/oughttohavetoldherthetruthearlier.Sheshouldn’thaveleftwithoutsayingaword.4.should/oughttohavedone表示責(zé)備或批評(píng),意為“本應(yīng)該…但”,oughtto的語(yǔ)氣更強(qiáng)烈,用于否定則表示“本不該…但”5.Should用于可能性推測(cè)時(shí),表“應(yīng)該，很可能”Theyleftat5:30.Theyshouldgettherenow.Youngpeopleshouldlearnhow521.作為情態(tài)動(dòng)詞用，常用在否定句和疑問(wèn)句中。Dare(need)+S+VS+daren’t(needn’t)+VIdaren’twalkthroughtheforestatnight.Dareyouwalkthroughtheforestatnight?Youneedn’treturnthebooknow.Needhegoyesterday?6.可兼做行為動(dòng)詞的情態(tài)動(dòng)詞：need、dare

1.作為情態(tài)動(dòng)詞用，常用在否定句和疑問(wèn)句中。Dare(ne53判斷正誤:

Howdareyousaysuchathing?Howdareyoutosaysuchathing?Hedaren’ttospeakEnglishbeforesuchacrowd,didhe?Hedaren’tspeakEnglishbeforesuchacrowd,darehe?判斷正誤:Howdareyousay54Nobodyneedtobeafraidofcatchingthedisease.Nobodyneedbeafraidofcatchingthedisease.Nobodyneedtobeafraidofca552.作實(shí)義動(dòng)詞用，常用在肯定句中,

有人稱(chēng)、時(shí)態(tài)、和數(shù)的變化Heneedstogotherehimself.Hehasgrownup,sowedon’tneedtoworryabouthim.

3.Sth(sb)need(want,request)+doing/tobedoneThehouseneedscleaning/tobecleanedTheboyneedssendingtothehospitalatonce.2.作實(shí)義動(dòng)詞用，常用在肯定句中,有人稱(chēng)、時(shí)態(tài)、和數(shù)的變化56表示推測(cè)——情態(tài)動(dòng)詞的重要用法肯定的推測(cè)可能的推測(cè)否定的推測(cè)疑問(wèn)的推測(cè)must

對(duì)將來(lái)

對(duì)現(xiàn)在

對(duì)過(guò)去情態(tài)動(dòng)詞may,might

can’t,couldn’tcan,could

+V.

+V.+havedone常見(jiàn)mustbe+bedoing

+V.+V.+havedone+bedoing

可以用not表示“可能不”

+V.+V.+havedone+bedoing+V.+V.+havedone+bedoing表示推測(cè)——情態(tài)動(dòng)詞的重要用法肯定的推測(cè)must57ExercisesExercises58I.Trytoexplainthemeaningsofthemodalverbsinthefollowingsentences.1.HecanspeakEnglishwell.2.Youcangohomenow.3.Thatcan’tbetrue.4.CouldyoupleaseshowmethewaytoBeihaiPark?5.Theyhuntersarelost.Theycouldstarve.6.MayIcomein?7.Hemaygiveyousomehelp?abilitypermissionguessingrequestpossibilitypermissionpossibilityI.Trytoexplainthemeanings598.Don’tworry.Iwillhelpyou.9.Oftenhewoulddressuplikearichman.10.Wouldyouliketojoinusfordinner?YoushallhavetheticketassoonasIgetit.Youshouldarriveattheairporttwohoursbeforehegoes.Itisfiveo’clock.Heshouldturnupsoon.WangFengwinsanawardeveryyear.Hmisepasthabitrequestpromisepredictionadviceguessing8.Don’tworry.Iwillhelpyou602.用情態(tài)動(dòng)詞完成句子1).You’vebeenworkingallday.You______beverytired.2).(Thedoorbellrings)Iwonderwhothatis.It______beLisa.She’sstillinthelibraryatthistime.3).Itisalongtimesincewemetlasttime.You______comeandseeusmoreoften.

mustcan’tshould2.用情態(tài)動(dòng)詞完成句子mustcan’tshould614.Ihaven’tdecidedwhereI’mgoingformyholidays.I_____gotoAustralia.5.Myfather’sbirthdayisccoming.What_____Igivehim?6.Whydon’tyoutryonthisdress?It_____lookniceonyou.mayshallwill4.Ihaven’tdecidedwhereI’m627.“Whowasthemantalkingwithyourteacher?”“I’mnotsure.It______beherbrother.”8.Idon’tknowwhentheguests_____be

here.They______arriveatanytime.mightwillcould7.“Whowasthemantalkingwi633.完成下列句子：

1.Idon’tknowwheresheis,she_______________.

(可能在武漢）(be)2.Atthismoment,ourteacher_______________（想必在批改）ourexampapers.(mark/grade)3.Theroadiswet.It________________(一定下雨了）

lastnight.(rain)

4.Yourmother_____________________________（一定一直在找你）(look)maybeinWuhangradingmustbemarking

musthaverainedmusthavebeenlookingforyou.3.完成下列句子：maybeinWuhan645.Philip________________________seriouslyinthecaraccident.(可能受了重傷).(hurt)6.---Lindahasgonetowork,butherbicycleisstillhere.--She___________________(可能走了)bybus.(go)7.Mike________________(一定還沒(méi)有找回)hiscar,forhecametoworkbybusthismorning.

may(might)havebeenhurtmay(might)havegonecan’thavefound4.Multiple-choice5.Philip____________________651.—Isn’tthatAnn’shusbandoverthere?—No,it________behim.I’msurehedoesn’twearglasses.(04全國(guó)I29)A.can’t B.mustnotC.won’tD.maynot2.—I’lltellMaryabouthernewjobtomorrow.—You________herlastweek.(04福建32)

A.oughttotell

B.wouldhavetold

C.musttell

D.shouldhavetold3.Ioftenseelightsinthatemptyhouse.DoyouthinkI________reportittothepolice?(04廣西21)A.shouldB.may C.will D.can4.Mr.White________at8:30forthemeeting,buthedidn’t

showup.(04廣西27)A.shouldhavearrived B.shouldarriveC.shouldhavehadarrived D.shouldbearriving5.—Excuseme.IsthistherightwaytotheSummerPalace?—Sorry,Iamnotsure.Butit________be.(04湖北26)A.m