人教版英语必修三Unit2-Grammar课件

Grammar

ModalverbsⅡGrammar

ModalverbsⅡ11.oughtto表职责和义务，说话人认为“应该……”否定形式：oughtnotto/oughtn’tto

疑问句形式：只把ought提前e.g.下次过马路时你应该更加小心。Yououghttobemorecarefulwhenyoucrosstheroadnexttime.

1.oughtto表职责和义务，说话人认为“应该……”2

你不应该再犯这种错误了。Yououghtnottomakethiskindofmistakeagain.---OughtItofinishthetaskbeforeteno’clock?---Yes,yououghtto.你不应该再犯这种错误了。3慢慢地进食，有助消化。Yououghttoeatslowlyandit’sgoodfordigestion.慢慢地进食，有助消化。Yououghttoeats4Yououghttohandinthehomeworkontime.Yououghttohandinthehomew51.WhattimeoughtI_______?A．arrivedB．arrivingC．arriveD．toarrive2.He_______speaktohismotherlikethat.A．oughtnottoB．doesn’toughttoC．notoughttoD．oughttonot1.WhattimeoughtI_______?6b.表推测，多指按常理的一种推测，“按理应该……”e.g.Accordingtothepolicythepriceoughttogodownsoon.要是他六点就出发的话，这会儿该到这里了.Ifhestartedatsix,heoughttobeherenow.

b.表推测，多指按常理的一种推测，“按理应该……”e.g.7c.多数情况下，oughtto可与should互换使用。oughtto的反意疑问句用shouldn’t替代。YououghttohavehelpedhimwithhisEnglish,________?A.won’tyouB.oughtnotyouC.shouldn’tyouD.wouldn’tyouc.多数情况下，oughtto可与should互换使用82.must和haveto

must的用法

1）表示主观的义务和必要,

主要用于肯定句和疑问句,

意思为

“必须……，得……，要……”；由must引起的疑问句，肯定回答要用must或have

to,

否定回答要用needn’t或don’t

have

to,

意思是“不必”；

2.must和haveto9

—

Must

I

finish

the

task

right

now?

我现在必须完成这个工作吗？—Yes,

you

must.

/

Yes,

you

have

to.

是的。

(—No,youneedn’t./No,youdon’thaveto.不，不必。)

10must的否定形式mustn’t表示禁止，意思是“不能，不许”。如：

Youmustn’tcomeherewithoutpermission.

未经允许，你不能来这儿。人教版英语必修三Unit2-Grammar课件11have

to

的用法

1）must表示一种主观的需要，而have

to

表示一种客观的需要，意思是“不得不”。

如：

Ihavetoattendanimportantmeetingthisafternoon.

今天下午我不得不参加一个重要的会议。have

to

的用法

1）must表示一种主观的需12

Motherisout,soIhavetolookaftertheshop.妈妈不在家，因此我不得不照看商店。

2）have

to

的否定形式是don’thaveto,相当于needn’t。如：

Theydon’thavetobuyacomputeratpresent.

他们目前没有必要买电脑。

Motherisout,soIhaveto13【考例】Thebosshasgiveneveryoneaspecialholiday,sowe____gotoworktomorrow.A.can’t B.mustn’tC.needn’t D.shouldn’t【点拨】考查情态动词。根据题意,可知这里表示“没有必要”,故只能选C项。【考例】Thebosshasgiveneveryon14【考例】─Whatdoyouthinkwecandoforouragedparents?─You____doanythingexcepttobewiththemandbeyourself.A.don’thavetoB.oughtn’ttoC.mustn’t D.can’t【点拨】根据题意“除了和他们呆在一起做你自己外,没有必要做任何事情。”可知这里选择don’thaveto表示“不必”。故选A项。【考例】─Whatdoyouthinkwecan153.needneedn’t+havedone表示做了本来不必去做的事。Sheneedn’thavegonetothestationyesterday.昨天她本不必到火车站去的.（昨天她去了）Youneedn’thaveboughtit.你本可不必买它的。（你买了）3.needneedn’t+havedone164.dare作情态动词多用于疑问句、否定句、条件状语从句及表示怀疑的名词性从句。

表“敢……”e.g.夜间我不敢在小树林里自己走。Idarenotwalkalonethroughthewoodatnight.你怎么敢做这样的事情。Howdareyoudosuchkindofthing?4.dare作情态动词多用于疑问句、否定句、条件状语从句及17Ifyoudarespeaktomelikethatagain,you’llbesorry.如果你在敢跟我那样说话，你会后悔的。Ifyoudarespeaktomeliket18need/dare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,wedon’tneedtoworryabouthim.Sth(sb)need(want,request)+doing/tobedone

Thehouseneedscleaning/tobecleaned.

Theboyneedssendingtothehospitalatonce.need/dare作实义动词用，常用在肯定句中,有人19Iwonderhowhe____thattotheteacher.A.daretosayB.daresayingC.notdaresayD.daredsayAsitturnedouttobeasmallhouseparty,we____soformally.Aneedn’tdressB.didn’thavetodressupC.MightnothavedressedupD.needn’thavedressedupDIwonderhowhe____thattothe201.Ithoughtyou__likesomethingtoread,soIhavebroughtyousomebooks.A.mayB.mightC.wouldD.must2.Whereismypen?I____it.A.mightloseB.wouldhavelostC.shouldhavelostD.musthavelostII.高考链接1.Ithoughtyou__likesometh213.Ididn’thearthephone.I__asleep.A.mustbeB.musthavebeenC.shouldbeD.shouldhavebeen3.Ididn’thearthephone.I224.--IsJohncomingbytrain?--Heshould,buthe__not.Helikesdrivinghiscar.

A.mustB.canC.needD.may5.Ithasbeenannouncedthatcandidates(候选人)____remainintheirseatsuntilallthepapershavebeencollected.(2002上海高考题）

A.canB.willC.mayD.shall4.--IsJohncomingbytrain?236.--Iheardtheywentskiinginthemountainslastwinter.

--It____truebecausetherewaslittlesnowthere.

A.maynotbeB.won’tbeC.couldn’tbeD.mustn’tbe6.--Iheardtheywentskiing247.---Therewerealreadyfivepeopleinthecar,buttheymanagedtotakemeaswell.---It___acomfortablejourney.

A.can’tbeB.shouldn’tbeC.mustn’thavebeenD.couldn’thavebeen

8.It’snearlyseveno’clock.Jack__behereatanymoment.

A.mustB.needC.shouldD.could7.---Therewerealreadyfive25Grammar

ModalverbsⅡGrammar

ModalverbsⅡ261.oughtto表职责和义务，说话人认为“应该……”否定形式：oughtnotto/oughtn’tto

疑问句形式：只把ought提前e.g.下次过马路时你应该更加小心。Yououghttobemorecarefulwhenyoucrosstheroadnexttime.

1.oughtto表职责和义务，说话人认为“应该……”27

你不应该再犯这种错误了。Yououghtnottomakethiskindofmistakeagain.---OughtItofinishthetaskbeforeteno’clock?---Yes,yououghtto.你不应该再犯这种错误了。28慢慢地进食，有助消化。Yououghttoeatslowlyandit’sgoodfordigestion.慢慢地进食，有助消化。Yououghttoeats29Yououghttohandinthehomeworkontime.Yououghttohandinthehomew301.WhattimeoughtI_______?A．arrivedB．arrivingC．arriveD．toarrive2.He_______speaktohismotherlikethat.A．oughtnottoB．doesn’toughttoC．notoughttoD．oughttonot1.WhattimeoughtI_______?31b.表推测，多指按常理的一种推测，“按理应该……”e.g.Accordingtothepolicythepriceoughttogodownsoon.要是他六点就出发的话，这会儿该到这里了.Ifhestartedatsix,heoughttobeherenow.

b.表推测，多指按常理的一种推测，“按理应该……”e.g.32c.多数情况下，oughtto可与should互换使用。oughtto的反意疑问句用shouldn’t替代。YououghttohavehelpedhimwithhisEnglish,________?A.won’tyouB.oughtnotyouC.shouldn’tyouD.wouldn’tyouc.多数情况下，oughtto可与should互换使用332.must和haveto

must的用法

1）表示主观的义务和必要,

主要用于肯定句和疑问句,

意思为

“必须……，得……，要……”；由must引起的疑问句，肯定回答要用must或have

to,

否定回答要用needn’t或don’t

have

to,

意思是“不必”；

2.must和haveto34

—

Must

I

finish

the

task

right

now?

我现在必须完成这个工作吗？—Yes,

you

must.

/

Yes,

you

have

to.

是的。

(—No,youneedn’t./No,youdon’thaveto.不，不必。)

35must的否定形式mustn’t表示禁止，意思是“不能，不许”。如：

Youmustn’tcomeherewithoutpermission.

未经允许，你不能来这儿。人教版英语必修三Unit2-Grammar课件36have

to

的用法

1）must表示一种主观的需要，而have

to

表示一种客观的需要，意思是“不得不”。

如：

Ihavetoattendanimportantmeetingthisafternoon.

今天下午我不得不参加一个重要的会议。have

to

的用法

1）must表示一种主观的需37

Motherisout,soIhavetolookaftertheshop.妈妈不在家，因此我不得不照看商店。

2）have

to

的否定形式是don’thaveto,相当于needn’t。如：

Theydon’thavetobuyacomputeratpresent.

他们目前没有必要买电脑。

Motherisout,soIhaveto38【考例】Thebosshasgiveneveryoneaspecialholiday,sowe____gotoworktomorrow.A.can’t B.mustn’tC.needn’t D.shouldn’t【点拨】考查情态动词。根据题意,可知这里表示“没有必要”,故只能选C项。【考例】Thebosshasgiveneveryon39【考例】─Whatdoyouthinkwecandoforouragedparents?─You____doanythingexcepttobewiththemandbeyourself.A.don’thavetoB.oughtn’ttoC.mustn’t D.can’t【点拨】根据题意“除了和他们呆在一起做你自己外,没有必要做任何事情。”可知这里选择don’thaveto表示“不必”。故选A项。【考例】─Whatdoyouthinkwecan403.needneedn’t+havedone表示做了本来不必去做的事。Sheneedn’thavegonetothestationyesterday.昨天她本不必到火车站去的.（昨天她去了）Youneedn’thaveboughtit.你本可不必买它的。（你买了）3.needneedn’t+havedone414.dare作情态动词多用于疑问句、否定句、条件状语从句及表示怀疑的名词性从句。

表“敢……”e.g.夜间我不敢在小树林里自己走。Idarenotwalkalonethroughthewoodatnight.你怎么敢做这样的事情。Howdareyoudosuchkindofthing?4.dare作情态动词多用于疑问句、否定句、条件状语从句及42Ifyoudarespeaktomelikethatagain,you’llbesorry.如果你在敢跟我那样说话，你会后悔的。Ifyoudarespeaktomeliket43need/dare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,wedon’tneedtoworryabouthim.Sth(sb)need(want,request)+doing/tobedone

Thehouseneedscleaning/tobecleaned.

Theboyneedssendingtothehospitalatonce.need/dare作实义动词用，常用在肯定句中,有人44Iwonderhowhe____thattotheteacher.A.daretosayB.daresayingC.notdaresayD.daredsayAsitturnedouttobeasmallhouseparty,we____soformally.Aneedn’tdressB.didn’thavetodressupC.MightnothavedressedupD.needn’thavedressedupDIwonderhowhe____thattothe451.Ithoughtyou__likesomethingtoread,soIhavebroughtyousomebooks.A.mayB.mightC.wouldD.must2.Whereismypen?I____it.A.mightloseB.wouldhavelostC.shouldhavelostD.musthavelostII.高考链接1.Ithoughtyou__likesometh463.Ididn’thearthephone.I__asleep.A.mustbe