人教版高中英語必修三課件：Unit2 Grammar

Unit2HealthyeatingUnit2GrammarGrammar情態(tài)動(dòng)詞用法對(duì)應(yīng)的意思canandcould1.表示能力能2.表猜測(cè)（疑問或否定句）不可能3.表許可或者請(qǐng)求許可可以mayandmight1.表許可或者請(qǐng)求許可可以2.表可能性可能3.表祝愿祝情態(tài)動(dòng)詞用法對(duì)應(yīng)的意思1.表示能力能2.表猜測(cè)（疑問或否定句情態(tài)動(dòng)詞用法對(duì)應(yīng)的意思

must1.表示必要性必須2.表推測(cè)（肯定句）一定，肯定3.表不可為而為偏偏，偏要4.表示禁止不許，不準(zhǔn)，不可以shall1.二，三人稱，表命令，允諾，警告等2.一，三人稱問句中，表征求對(duì)方意見3.第一人稱，表將來情態(tài)動(dòng)詞用法對(duì)應(yīng)的意思1.表示必要性必須2.表推測(cè)（肯定情態(tài)動(dòng)詞用法對(duì)應(yīng)的意思should1.表示應(yīng)當(dāng)應(yīng)當(dāng)，應(yīng)該2.表示推測(cè)（按道理按計(jì)劃）應(yīng)該會(huì)will1.表示愿望，計(jì)劃將2.表示傾向或者習(xí)慣性動(dòng)作會(huì)3.表請(qǐng)求，詢問請(qǐng)……好嗎？would1.過去曾有的…要，會(huì)，將2.委婉請(qǐng)求，看法請(qǐng)……好嗎？情態(tài)動(dòng)詞用法對(duì)應(yīng)的意思should1.表示應(yīng)當(dāng)應(yīng)當(dāng)，應(yīng)該2Findthesentencescontainingmodalverbsinthereadingpassage.Thenbylunchtimetheywouldallbesold.Whatcouldhavehappened?Nothingcouldbebetter.Somethingterriblemusthave happenedifLiChangwasnottocomingtoeatinhisrestaurantashealwaysdid.FindthesentencescontainingHecouldnotbelievehiseyes.Perhapsheshouldgotothelibraryandfindout.Hehadbetterdosomeresearch!EventhoughhercustomersmightgetthinaftereatingYongHui’sfood,…Theywouldbecometiredveryquickly.Hecouldnotbelievehiseyes.1.should和oughttoa.should,oughtto都可表示“應(yīng)該”。oughtto用于表示按道理應(yīng)當(dāng)，常指客觀的義務(wù)或責(zé)任，大多數(shù)情況下可用should代替，但比should語氣重。Ishouldhelpherbecausesheisintrouble.Yououghttotakecareofthebaby.Modalverbs1.should和oughttoIshouldhelb.表示勸告、建議或命令時(shí)，should

和oughtto可通用，但在疑問句中常用should。oughtto的否定式為oughtn’tto或oughtnotto。Youshould/oughttogotoclassrightaway.________Iopenthewindow?Whatshouldwedonext?Shouldb.表示勸告、建議或命令時(shí)，shouldYoushouYou_____________________(oughtto)leaveinsuchahurry.你不應(yīng)該離開的這么匆忙。oughtn’t/oughtnottoYou_____________________(ougc.should,oughtto都可表示推測(cè)。Heoughtto/shouldbehomebynow.Thisiswheretheoiloughtto/shouldbe.注意：should和oughtto后面跟動(dòng)詞不定式的完成式,其肯定句表示“過去應(yīng)該做而未做”,其否定句則表示“過去不該做但做了”。c.should,oughtto都可表示推測(cè)。HeYou__________________________thedecisionaweekago.你應(yīng)該在一周前就做決定。I___________________suchafoolishmistake.我不應(yīng)該犯這樣愚蠢的錯(cuò)誤。多數(shù)情況下，oughtto可與should互換使用。oughtto的反意疑問句用shouldn’t替代。should/oughttohave

madeshouldn’thavemadeYou__________________________YououghttohavehelpedhimwithhisEnglish,________?A.won’tyouB.oughtnotyouC.shouldn’tyouD.wouldn’tyouYououghttohavehelpedhimw2.must和haveto

must的用法

1)表示主觀的義務(wù)和必要,

主要用于肯定句和疑問句,

意思為“必須……，得……，要……”；由must引起的疑問句，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havetomust的否定形式mustn’t表示禁止，意思是“不能，不許”。如：

—

Must

I

finish

the

task

right

now?

我現(xiàn)在必須完成這個(gè)工作嗎？—Yes,

you

must.

/

Yes,

you

have

to.

是的。(—No,you_______./No,youdon’thaveto.不，不必。)Youmustn’tcomeherewithoutpermission.未經(jīng)允許，你不能來這兒。needn’tmust的否定形式mustn’t表示禁止，意思是“不能，不許

have

to的用法

1)must表示一種主觀的需要，而have

to表示一種客觀的需要，意思是“不得不”。

如：

Ihavetoattendanimportantmeetingthisafternoon.

今天下午我不得不參加一個(gè)重要的會(huì)議。

Motherisout,soIhavetolookaftertheshop.

媽媽不在家，因此我不得不照看商店。have

2)have

to的否定形式是don’thaveto,相當(dāng)于needn’t。如：

Theydon’t

havetobuyacomputeratpresent.

他們目前沒有必要買電腦。

haveto的第三人稱單數(shù)形式是hasto，一般過去式是hadto，一般將來式是willhaveto。LiHuahastopassanexaminationbeforehecanstartwork.Mycarwasbroken,soIhadtowalkhome.It’llhavetobeonaSunday.I’llbeworkingeveryotherday.haveto的第三人稱單數(shù)形式是hasto，一般過去式是Thebosshasgiveneveryoneaspecialholiday,sowe____gotoworktomorrow.A.can’t B.mustn’tC.needn’t D.shouldn’t【點(diǎn)撥】考查情態(tài)動(dòng)詞。根據(jù)題意,可知這里表示“沒有必要”,故只能選C項(xiàng)。Thebosshasgiveneveryonea─Whatdoyouthinkwecandofor ouragedparents?─You______doanythingexcepttobe withthemandbeyourself.A.don’thavetoB.oughtn’ttoC.mustn’t D.can’t【點(diǎn)撥】根據(jù)題意“除了和他們呆在一起做你自己外,沒有必要做任何事情?！笨芍@里選擇don’thaveto表示“不必”。故選A項(xiàng)。─Whatdoyouthinkwecando3.must和needneed作情態(tài)動(dòng)詞時(shí),只能用于疑問句和否定句。構(gòu)成否定句和疑問句時(shí)不借助于助動(dòng)詞do。

—NeedIfinishtheworktoday?—Yes,youmust./No,youneedn’t.3.must和needb.need也可做實(shí)義動(dòng)詞，常用于下列句式：主語（sb）needtodosth.主語（sth）needtobedone/doing主語need+n.Youneed_______(know)yourownweaknessandstrength.Thecucumbersandmushroomsneed__________(cut)uptomakedumplings.Ineedsome________（醋）.toknowvinegartobecut/cuttingb.need也可做實(shí)義動(dòng)詞，常用于下列句式：tokno情態(tài)動(dòng)詞用法ought/oughtn’tto按道理應(yīng)當(dāng)，常指客觀的義務(wù)和責(zé)任should/shouldn’t勸告，建議，命令mustn’t禁止，嚴(yán)禁needn’t不必，沒有必要(don’t)haveto不得不，強(qiáng)調(diào)客觀需要will將，會(huì)，請(qǐng)……好嗎？can/can’t能力，許可，否定疑問表推測(cè)情態(tài)動(dòng)詞用法ought/oughtn’tto按道理應(yīng)當(dāng)，Choosesuitablemodalverbsbelowtocompletethefollowingdialogues.ought/oughtn’ttoshould/shouldn’twillmustn’tneedn’t(don’t)havetocan/can’t1.Sam:HowcanIgrowthinner,Mum?Mum:Well,you_______eatfoodwithplentyoffibrethathelpsyoudigestbetter.Andyou______stopdrinkingcolaoreatingsweetfood.havetoshouldDiscoveringusefulstructuresChoosesuitablemodalverbsbeSam:DoesitmeanI_________eatmyfavouritefriedchickenanymore?Mum:Notexactly,ifyoulovefriedchicken,you________giveitup.Justeatitlessoften.You______________________________worrytoomuch:alittlefriedchicken____doyougood!shouldn’tneedn’tdon’thaveto/needn’t/shouldn’twillSam:DoesitmeanI_________2.Doctor:Youaresickbecauseyou’veeatenpoisonousmushrooms.Wheredidyougetthem?Lucy:Ipickedthemintheforest.Iknowwe_______eatfreshvegetables.Doctor:Oh,butyou_______eatthemuntilyou’resuretheyarenotpoisonous.Lucy:Thankyou,doctor.I’llbemorecarefulnexttime.havetomustn’t2.Doctor:Youaresickbecaus3.Charles:IwishIcouldseethingsclearlyinthedark.Tom:Eatingcarrots________helpyouseebetter.You_______eatsomeeveryday.oughttoshould3.Charles:IwishIcouldseeHomework1.《學(xué)案》page22，語法沖關(guān)。2.《學(xué)案》page28，完型填空

Homework1.《學(xué)案》page22，語法ThankYou!ThankYou!Unit2HealthyeatingUnit2GrammarGrammar情態(tài)動(dòng)詞用法對(duì)應(yīng)的意思canandcould1.表示能力能2.表猜測(cè)（疑問或否定句）不可能3.表許可或者請(qǐng)求許可可以mayandmight1.表許可或者請(qǐng)求許可可以2.表可能性可能3.表祝愿祝情態(tài)動(dòng)詞用法對(duì)應(yīng)的意思1.表示能力能2.表猜測(cè)（疑問或否定句情態(tài)動(dòng)詞用法對(duì)應(yīng)的意思

must1.表示必要性必須2.表推測(cè)（肯定句）一定，肯定3.表不可為而為偏偏，偏要4.表示禁止不許，不準(zhǔn)，不可以shall1.二，三人稱，表命令，允諾，警告等2.一，三人稱問句中，表征求對(duì)方意見3.第一人稱，表將來情態(tài)動(dòng)詞用法對(duì)應(yīng)的意思1.表示必要性必須2.表推測(cè)（肯定情態(tài)動(dòng)詞用法對(duì)應(yīng)的意思should1.表示應(yīng)當(dāng)應(yīng)當(dāng)，應(yīng)該2.表示推測(cè)（按道理按計(jì)劃）應(yīng)該會(huì)will1.表示愿望，計(jì)劃將2.表示傾向或者習(xí)慣性動(dòng)作會(huì)3.表請(qǐng)求，詢問請(qǐng)……好嗎？would1.過去曾有的…要，會(huì)，將2.委婉請(qǐng)求，看法請(qǐng)……好嗎？情態(tài)動(dòng)詞用法對(duì)應(yīng)的意思should1.表示應(yīng)當(dāng)應(yīng)當(dāng)，應(yīng)該2Findthesentencescontainingmodalverbsinthereadingpassage.Thenbylunchtimetheywouldallbesold.Whatcouldhavehappened?Nothingcouldbebetter.Somethingterriblemusthave happenedifLiChangwasnottocomingtoeatinhisrestaurantashealwaysdid.FindthesentencescontainingHecouldnotbelievehiseyes.Perhapsheshouldgotothelibraryandfindout.Hehadbetterdosomeresearch!EventhoughhercustomersmightgetthinaftereatingYongHui’sfood,…Theywouldbecometiredveryquickly.Hecouldnotbelievehiseyes.1.should和oughttoa.should,oughtto都可表示“應(yīng)該”。oughtto用于表示按道理應(yīng)當(dāng)，常指客觀的義務(wù)或責(zé)任，大多數(shù)情況下可用should代替，但比should語氣重。Ishouldhelpherbecausesheisintrouble.Yououghttotakecareofthebaby.Modalverbs1.should和oughttoIshouldhelb.表示勸告、建議或命令時(shí)，should

和oughtto可通用，但在疑問句中常用should。oughtto的否定式為oughtn’tto或oughtnotto。Youshould/oughttogotoclassrightaway.________Iopenthewindow?Whatshouldwedonext?Shouldb.表示勸告、建議或命令時(shí)，shouldYoushouYou_____________________(oughtto)leaveinsuchahurry.你不應(yīng)該離開的這么匆忙。oughtn’t/oughtnottoYou_____________________(ougc.should,oughtto都可表示推測(cè)。Heoughtto/shouldbehomebynow.Thisiswheretheoiloughtto/shouldbe.注意：should和oughtto后面跟動(dòng)詞不定式的完成式,其肯定句表示“過去應(yīng)該做而未做”,其否定句則表示“過去不該做但做了”。c.should,oughtto都可表示推測(cè)。HeYou__________________________thedecisionaweekago.你應(yīng)該在一周前就做決定。I___________________suchafoolishmistake.我不應(yīng)該犯這樣愚蠢的錯(cuò)誤。多數(shù)情況下，oughtto可與should互換使用。oughtto的反意疑問句用shouldn’t替代。should/oughttohave

madeshouldn’thavemadeYou__________________________YououghttohavehelpedhimwithhisEnglish,________?A.won’tyouB.oughtnotyouC.shouldn’tyouD.wouldn’tyouYououghttohavehelpedhimw2.must和haveto

must的用法

1)表示主觀的義務(wù)和必要,

主要用于肯定句和疑問句,

意思為“必須……，得……，要……”；由must引起的疑問句，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havetomust的否定形式mustn’t表示禁止，意思是“不能，不許”。如：

—

Must

I

finish

the

task

right

now?

我現(xiàn)在必須完成這個(gè)工作嗎？—Yes,

you

must.

/

Yes,

you

have

to.

是的。(—No,you_______./No,youdon’thaveto.不，不必。)Youmustn’tcomeherewithoutpermission.未經(jīng)允許，你不能來這兒。needn’tmust的否定形式mustn’t表示禁止，意思是“不能，不許

have

to的用法

1)must表示一種主觀的需要，而have

to表示一種客觀的需要，意思是“不得不”。

如：

Ihavetoattendanimportantmeetingthisafternoon.

今天下午我不得不參加一個(gè)重要的會(huì)議。

Motherisout,soIhavetolookaftertheshop.

媽媽不在家，因此我不得不照看商店。have

2)have

to的否定形式是don’thaveto,相當(dāng)于needn’t。如：

Theydon’t

havetobuyacomputeratpresent.

他們目前沒有必要買電腦。

haveto的第三人稱單數(shù)形式是hasto，一般過去式是hadto，一般將來式是willhaveto。LiHuahastopassanexaminationbeforehecanstartwork.Mycarwasbroken,soIhadtowalkhome.It’llhavetobeonaSunday.I’llbeworkingeveryotherday.haveto的第三人稱單數(shù)形式是hasto，一般過去式是Thebosshasgiveneveryoneaspecialholiday,sowe____gotoworktomorrow.A.can’t B.mustn’tC.needn’t D.shouldn’t【點(diǎn)撥】考查情態(tài)動(dòng)詞。根據(jù)題意,可知這里表示“沒有必要”,故只能選C項(xiàng)。Thebosshasgiveneveryonea─Whatdoyouthinkwecandofor ouragedparents?─You______doanythingexcepttobe withthemandbeyourself.A.don’thavetoB.oughtn’ttoC.mustn’t D.can’t【點(diǎn)撥】根據(jù)題意“除了和他們呆在一起做你自己外,沒有必要做任何事情。”可知這里選擇don’thaveto表示“不必”。故選A項(xiàng)。─Whatdoyouthinkwecando3.must和needneed作情態(tài)動(dòng)詞時(shí),只能用于疑問句和否定句。構(gòu)成否定句和疑問句時(shí)不借助于助動(dòng)詞do。

—NeedIfinishtheworktoday?—Yes,youmust./No,youneedn’t.3.must和needb.need也可做實(shí)義動(dòng)詞，常用于下列句式：主語（sb）needtodosth.主語（sth）needtobedone/doing主語need+n.Youneed_______(know)yourownweaknessandstrength.Thecucumbersandmushroomsneed__________(cut)uptomakedumplings.Ineedsome________（醋）.toknowvinegartobecut/cuttingb.need也可做實(shí)義動(dòng)詞，常用于下列句式：tokno情態(tài)動(dòng)詞用法ought/oughtn’tto按道理應(yīng)當(dāng)，常指客觀的義務(wù)和責(zé)任should/shouldn’t勸告，建議，命令mustn’t禁止，嚴(yán)禁needn’t不必，沒有必要(don’t)haveto不得不，強(qiáng)調(diào)客觀需要will將，會(huì)，請(qǐng)……好嗎？can/can’t能力，許可，否定疑問表推測(cè)情態(tài)動(dòng)詞用法ought/oughtn’tto按道理應(yīng)當(dāng)，Choosesuitablemodalverbsbelowtocompletethefollowingdialogues.ought/oughtn’ttoshould/shouldn’twillmustn’tneedn’t(don’t)havetocan/can’t1.Sam:HowcanIgrowthinner,Mum?Mum:Well,you_______eatfoodwithplentyoffibrethathelpsyoudigestbetter.Andyou______stopdrinkingcolaoreatingsw