高中情态动词用法课件

Grammar__________Grammar__________1Firstwealthishealth.Q1:Whatshould/shouldn’twedotokeephealthy?Q2:Whatkindoffoodmustweeattobestrong?Q3:Whatoughtwetoeattostayslim?Firstwealthisheal2主要情态动词Can,couldMay,mightMust/havetoNeedDareWill/wouldShall/should/oughtto

Whatmodalverbshaveyoulearned?主要情态动词Can,couldWhatmodalve31.情态动词有一定的意义，只表示期待或估计某事的发生，不能表示正在发生或已经发生的事情。2.没有人称和数的变化，即情态动词第三人称单数不加-s。3.不能独立使用，它和后面的动词构成谓语。4.情态动词

除ought

和have

外，后面只能接动词原形5.

情态动词没有非谓语形式，即没有不定式，分词等形式。

只作情态动词的can/could,may/might,oughtto,must可情态可实义的need,dare可情态可助动词的shall/should,will/would相当于情态动词的haveto情态动词的语法特征1.情态动词有一定的意义，只表示期待或估计某事的发生，不能4情态动词含义否定式注意点must表必要“必须”needn’t“不必”(区别

haveto)有时表“偏要”表推测“一定”can’t“不可能”只能用于肯定句，不能用于否定、疑问句1.must&need&haveto情态动词含义否定式注意点表必要needn’t(区别hav5

注意：1)must表示推测时，只能用于肯定句。mustdo对一般时的肯定推测musthavedone对过去发生的事情作出的肯定判断mustbedoing

对现在的动作进行肯定推测e.g.他们买了一辆新车。他们一定很有钱Theyhaveboughtanewcar.Theymusthavealotofmoney.他现在一定在看小说Hemustbereadingnovelsnow.路是湿的。昨天晚上一定下雨了。Theroadiswet.Itmusthaverainedlastnight.注意：mustdo6---Need

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

1.作情态动词时,仅用于否定或疑问句,后接动词原形,表“需要”2)needYouneedn’treturnthebooknow.2.needn’thavedone表示做了本不必要做的事情,意为“本不必要…”OurcolorTVsetisstillgoodenough.Youneedn’thaveboughtanewone.3.作实义动词时,表示“需要”，有人称、时态、和数的变化Heneedstofinishitthisevening.Theclassroomneedscleaning.---Needhestartfromthebeg74注意对need问句的回答:--NeedIfinishtheworktoday?--Yes,________________.No,________________.No,________________.youmustyouneedn’tyoudon’thavetoneedn’t对其它情态动词的回答:--ShallItellJohnaboutit?--No,you__________.--No,you__________.

--Mustwedoitnow?--No,you__________.--No,you__________.needn’tdon’thavetoneedn’tdon’thaveto4注意对need问句的回答:youmustyounee8情态动词含义否定式注意点can/could表能力“能/会”can’t“不会，不能”区别

beableto表许可“可以”can’t“不可以，不许”代替may表推测“可能”can’t“不可能”主要用于否定/疑问句中1表示某人通过努力克服困难做成某事,要用was/wereableto.2could,might,would表委婉语气用于疑问句,答语仍须用can,may,will.3can用于肯定句中,可表示”有时可能”2.can/could

情态动词含义否定式注意点表能力can’t区别94.can/couldhavedone“本可以，本可能做某事”用于肯定句中，表示对过去发生的事情做出的判断。你本来可以考的更好。Youcouldhavehadabettermark.5.can/couldnothavedone

对过去发生行为进行推测:不可能做某事1)刚才我还看见他了，所以他不可能出国的。Isawhimjustnowsohecouldn’thavegoneabroad.2)门是锁着的，所以她不可能在家。Thedoorwaslocked，soshecouldn’thavebeen

athome.

4.can/couldhavedone“本可以，本可10情态动词含义否定式注意点may/might表许可“可以”mustn’t“不许，严禁”口语中也可用can’t表推测“可能”can’t“不可能”主要用于肯定句，不能用在疑问句

（maynot可能不）3.may/might情态动词含义否定式注意点表许可mus11注意：might/mayhavedone,表示对过去发生的动作进行可能性推测，1）他可能去医务室了。Hemayhavegonetotheclinic.2）他可能已经从报纸上知道这个消息了。Hemighthavereadaboutthenewsinthenewspaper.注意：1）他可能去医务室了。Hemayhavegone121.---MayIuseyourpencil?---Yes,youmay./No,youmustn’t.2.Shemaynotbeworkingnow.3.Johnmightbeathomenow.4.Helenmaygoonthetripwithus,butsheisn’tverysureyet.5.Shemay/mighthavereaditinthepaper.6.Hemaynothavefinishedreadingthebook.1.---MayIuseyourpencil?2.13情态动词用法will表请求(第二人称)表意志,意愿表某种倾向或习惯would更客气的请求过去的意志（愿）过去的倾向或习惯4.will/would情态动词用法wi14情态动词用法shall征求对方意见(第一,三人称)表示命令,警告,威胁或允诺(第二,三人称)should/oughtto表示劝告,建议,命令或责任“应该,必须”表示推测,

“理应,估计,大概,可望”should还可表示“竟然”5.shall,should和oughtto情态动词用法shall15YoushalldoasIsay.(命令)1.在陈述句中,shall用于二、三人称表示允诺、警告、命令、决心等。ShallIopenthewindowforyou？（征求意见）2.在疑问句中,用于一、三人称，用来表示请求或征求意见。注意：Tellhimthatheshallhavethebooktomorrow.(允诺)Nothingshall

stopmedoingit.(决心)

Shallhefetchsomewaterforyou？（请求）YoushalldoasIsay.(命令)1.16Youngpeopleshouldlearnhowtousecomputers.3.should常表示劝告、建议、命令，与oughtto意义相近，但oughtto多表示责任、义务，语气强烈。Everycitizenoughttoobeylaw.Yououghtnottogo.Youshould/oughttohavetoldherthetruthearlier.Sheshouldn’thaveleftwithoutsayingaword.4.should/oughttohavedone表示责备或批评,意为“本应该…但”,oughtto的语气更强烈,用于否定则表示“本不该…但”5.Should用于可能性推测时,表“应该，很可能”Theyleftat5:30.Theyshouldgettherenow.Youngpeopleshouldlearnhow171.作为情态动词用，常用在否定句和疑问句中。Dare(need)+S+VS+daren’t(needn’t)+VIdaren’twalkthroughtheforestatnight.Dareyouwalkthroughtheforestatnight?Youneedn’treturnthebooknow.Needhegoyesterday?6.可兼做行为动词的情态动词：need、dare

1.作为情态动词用，常用在否定句和疑问句中。Dare(ne18判断正误:

Howdareyousaysuchathing?Howdareyoutosaysuchathing?Hedaren’ttospeakEnglishbeforesuchacrowd,didhe?Hedaren’tspeakEnglishbeforesuchacrowd,darehe?判断正误:Howdareyousay19Nobodyneedtobeafraidofcatchingthedisease.Nobodyneedbeafraidofcatchingthedisease.Nobodyneedtobeafraidofca202.作实义动词用，常用在肯定句中,

有人称、时态、和数的变化Heneedstogotherehimself.Hehasgrownup,sowedon’tneedtoworryabouthim.

3.Sth(sb)need(want,request)+doing/tobedoneThehouseneedscleaning/tobecleanedTheboyneedssendingtothehospitalatonce.2.作实义动词用，常用在肯定句中,有人称、时态、和数的变化21表示推测——情态动词的重要用法肯定的推测可能的推测否定的推测疑问的推测must

对将来

对现在

对过去情态动词may,might

can’t,couldn’tcan,could

+V.

+V.+havedone常见mustbe+bedoing

+V.+V.+havedone+bedoing

可以用not表示“可能不”

+V.+V.+havedone+bedoing+V.+V.+havedone+bedoing表示推测——情态动词的重要用法肯定的推测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.用情态动词完成句子1).You’vebeenworkingallday.You______beverytired.2).(Thedoorbellrings)Iwonderwhothatis.It______beLisa.She’sstillinthelibraryatthistime.3).Itisalongtimesincewemetlasttime.You______comeandseeusmoreoften.

mustcan’tshould2.用情态动词完成句子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_______________.

(可能在武汉）(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.(可能受了重伤).(hurt)6.---Lindahasgonetowork,butherbicycleisstillhere.--She___________________(可能走了)bybus.(go)7.Mike________________(一定还没有找回)hiscar,forhecametoworkbybusthismorning.

may(might)havebeenhurtmay(might)havegonecan’thavefound4.Multiple-choice5.Philip____________________301.—Isn’tthatAnn’shusbandoverthere?—No,it________behim.I’msurehedoesn’twearglasses.(04全国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广西21)A.shouldB.may C.will D.can4.Mr.White________at8:30forthemeeting,buthedidn’t

showup.(04广西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江苏22)A.mustn'tB.maynotC.can'tD.needn’t8.—Mum,I’vebeenstudyingEnglishsince8o’clock.________IgooutandplaywithTomforawhile?—No,I’mafraidnot.Besides,it’srainingoutsidenow.(04辽宁29)A.Can’t B.Wouldn’t C.Maynot D.Won’t9.You________betired—you'veonlybeenworkingforanhour.(04全国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重庆24)A.may

B.should

C.must

D.shall14.Hepaidforaseat,whenhe________haveenteredfree.(05年山东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经常不断地学习,你就什么都知道。你知道得越多,你就越有力量StudyConstantly,AndYouWillKnowEverything.TheMoreYouKnow,TheMorePowerfulYouWillBe写在最后经常不断地学习,你就什么都知道。你知道得越多,你就越有力量写34感谢聆听不足之处请大家批评指导PleaseCriticizeAndGuideTheShortcomings结束语讲师：XXXXXXXX年XX月XX日

感谢聆听结束语讲师：XXXXXX35Grammar__________Grammar__________36Firstwealthishealth.Q1:Whatshould/shouldn’twedotokeephealthy?Q2:Whatkindoffoodmustweeattobestrong?Q3:Whatoughtwetoeattostayslim?Firstwealthisheal37主要情态动词Can,couldMay,mightMust/havetoNeedDareWill/wouldShall/should/oughtto

Whatmodalverbshaveyoulearned?主要情态动词Can,couldWhatmodalve381.情态动词有一定的意义，只表示期待或估计某事的发生，不能表示正在发生或已经发生的事情。2.没有人称和数的变化，即情态动词第三人称单数不加-s。3.不能独立使用，它和后面的动词构成谓语。4.情态动词

除ought

和have

外，后面只能接动词原形5.

情态动词没有非谓语形式，即没有不定式，分词等形式。

只作情态动词的can/could,may/might,oughtto,must可情态可实义的need,dare可情态可助动词的shall/should,will/would相当于情态动词的haveto情态动词的语法特征1.情态动词有一定的意义，只表示期待或估计某事的发生，不能39情态动词含义否定式注意点must表必要“必须”needn’t“不必”(区别

haveto)有时表“偏要”表推测“一定”can’t“不可能”只能用于肯定句，不能用于否定、疑问句1.must&need&haveto情态动词含义否定式注意点表必要needn’t(区别hav40

注意：1)must表示推测时，只能用于肯定句。mustdo对一般时的肯定推测musthavedone对过去发生的事情作出的肯定判断mustbedoing

对现在的动作进行肯定推测e.g.他们买了一辆新车。他们一定很有钱Theyhaveboughtanewcar.Theymusthavealotofmoney.他现在一定在看小说Hemustbereadingnovelsnow.路是湿的。昨天晚上一定下雨了。Theroadiswet.Itmusthaverainedlastnight.注意：mustdo41---Need

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

1.作情态动词时,仅用于否定或疑问句,后接动词原形,表“需要”2)needYouneedn’treturnthebooknow.2.needn’thavedone表示做了本不必要做的事情,意为“本不必要…”OurcolorTVsetisstillgoodenough.Youneedn’thaveboughtanewone.3.作实义动词时,表示“需要”，有人称、时态、和数的变化Heneedstofinishitthisevening.Theclassroomneedscleaning.---Needhestartfromthebeg424注意对need问句的回答:--NeedIfinishtheworktoday?--Yes,________________.No,________________.No,________________.youmustyouneedn’tyoudon’thavetoneedn’t对其它情态动词的回答:--ShallItellJohnaboutit?--No,you__________.--No,you__________.

--Mustwedoitnow?--No,you__________.--No,you__________.needn’tdon’thavetoneedn’tdon’thaveto4注意对need问句的回答:youmustyounee43情态动词含义否定式注意点can/could表能力“能/会”can’t“不会，不能”区别

beableto表许可“可以”can’t“不可以，不许”代替may表推测“可能”can’t“不可能”主要用于否定/疑问句中1表示某人通过努力克服困难做成某事,要用was/wereableto.2could,might,would表委婉语气用于疑问句,答语仍须用can,may,will.3can用于肯定句中,可表示”有时可能”2.can/could

情态动词含义否定式注意点表能力can’t区别444.can/couldhavedone“本可以，本可能做某事”用于肯定句中，表示对过去发生的事情做出的判断。你本来可以考的更好。Youcouldhavehadabettermark.5.can/couldnothavedone

对过去发生行为进行推测:不可能做某事1)刚才我还看见他了，所以他不可能出国的。Isawhimjustnowsohecouldn’thavegoneabroad.2)门是锁着的，所以她不可能在家。Thedoorwaslocked，soshecouldn’thavebeen

athome.

4.can/couldhavedone“本可以，本可45情态动词含义否定式注意点may/might表许可“可以”mustn’t“不许，严禁”口语中也可用can’t表推测“可能”can’t“不可能”主要用于肯定句，不能用在疑问句

（maynot可能不）3.may/might情态动词含义否定式注意点表许可mus46注意：might/mayhavedone,表示对过去发生的动作进行可能性推测，1）他可能去医务室了。Hemayhavegonetotheclinic.2）他可能已经从报纸上知道这个消息了。Hemighthavereadaboutthenewsinthenewspaper.注意：1）他可能去医务室了。Hemayhavegone471.---MayIuseyourpencil?---Yes,youmay./No,youmustn’t.2.Shemaynotbeworkingnow.3.Johnmightbeathomenow.4.Helenmaygoonthetripwithus,butsheisn’tverysureyet.5.Shemay/mighthavereaditinthepaper.6.Hemaynothavefinishedreadingthebook.1.---MayIuseyourpencil?2.48情态动词用法will表请求(第二人称)表意志,意愿表某种倾向或习惯would更客气的请求过去的意志（愿）过去的倾向或习惯4.will/would情态动词用法wi49情态动词用法shall征求对方意见(第一,三人称)表示命令,警告,威胁或允诺(第二,三人称)should/oughtto表示劝告,建议,命令或责任“应该,必须”表示推测,

“理应,估计,大概,可望”should还可表示“竟然”5.shall,should和oughtto情态动词用法shall50YoushalldoasIsay.(命令)1.在陈述句中,shall用于二、三人称表示允诺、警告、命令、决心等。ShallIopenthewindowforyou？（征求意见）2.在疑问句中,用于一、三人称，用来表示请求或征求意见。注意：Tellhimthatheshallhavethebooktomorrow.(允诺)Nothingshall

stopmedoingit.(决心)

Shallhefetchsomewaterforyou？（请求）YoushalldoasIsay.(命令)1.51Youngpeopleshouldlearnhowtousecomputers.3.should常表示劝告、建议、命令，与oughtto意义相近，但oughtto多表示责任、义务，语气强烈。Everycitizenoughttoobeylaw.Yououghtnottogo.Youshould/oughttohavetoldherthetruthearlier.Sheshouldn’thaveleftwithoutsayingaword.4.should/oughttohavedone表示责备或批评,意为“本应该…但”,oughtto的语气更强烈,用于否定则表示“本不该…但”5.Should用于可能性推测时,表“应该，很可能”Theyleftat5:30.Theyshouldgettherenow.Youngpeopleshouldlearnhow521.作为情态动词用，常用在否定句和疑问句中。Dare(need)+S+VS+daren’t(needn’t)+VIdaren’twalkthroughtheforestatnight.Dareyouwalkthroughtheforestatnight?Youneedn’treturnthebooknow.Needhegoyesterday?6.可兼做行为动词的情态动词：need、dare

1.作为情态动词用，常用在否定句和疑问句中。Dare(ne53判断正误:

Howdareyousaysuchathing?Howdareyoutosaysuchathing?Hedaren’ttospeakEnglishbeforesuchacrowd,didhe?Hedaren’tspeakEnglishbeforesuchacrowd,darehe?判断正误:Howdareyousay54Nobodyneedtobeafraidofcatchingthedisease.Nobodyneedbeafraidofcatchingthedisease.Nobodyneedtobeafraidofca552.作实义动词用，常用在肯定句中,

有人称、时态、和数的变化Heneedstogotherehimself.Hehasgrownup,sowedon’tneedtoworryabouthim.

3.Sth(sb)need(want,request)+doing/tobedoneThehouseneedscleaning/tobecleanedTheboyneedssendingtothehospitalatonce.2.作实义动词用，常用在肯定句中,有人称、时态、和数的变化56表示推测——情态动词的重要用法肯定的推测可能的推测否定的推测疑问的推测must

对将来

对现在

对过去情态动词may,might

can’t,couldn’tcan,could

+V.

+V.+havedone常见mustbe+bedoing

+V.+V.+havedone+bedoing

可以用not表示“可能不”

+V.+V.+havedone+bedoing+V.+V.+havedone+bedoing表示推测——情态动词的重要用法肯定的推测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.用情态动词完成句子1).You’vebeenworkingallday.You______beverytired.2).(Thedoorbellrings)Iwonderwhothatis.It______beLisa.She’sstillinthelibraryatthistime.3).Itisalongtimesincewemetlasttime.You______comeandseeusmoreoften.

mustcan’tshould2.用情态动词完成句子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_______________.

(可能在武汉）(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.(可能受了重伤).(hurt)6.---Lindahasgonetowork,butherbicycleisstillhere.--She___________________(可能走了)bybus.(go)7.Mike________________(一定还没有找回)hiscar,forhecametoworkbybusthismorning.

may(might)havebeenhurtmay(might)havegonecan’thavefound4.Multiple-choice5.Philip____________________651.—Isn’tthatAnn’shusbandoverthere?—No,it________behim.I’msurehedoesn’twearglasses.(04全国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广西21)A.shouldB.may C.will D.can4.Mr.White________at8:30forthemeeting,buthedidn’t

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