Unit2Let'scelebrateUsinglanguage情態(tài)動(dòng)詞課件高中英語(yǔ)

Unit2Let’scelebrateModals(2)回歸第1單元學(xué)習(xí)的情態(tài)動(dòng)詞can,couldmust,havebeabletodareneedLookatthesentencesfromthereadingpassageandanswerthequestions.aThatiswhyLettersfromFatherChristmascouldbetheperfectbook…bThechildrenmusthavebeenveryexcitedastheyopenedit.c…theymightnotreceivetheirpresentsiftheywerenotgood.01Discoveringtherules1)Whatdothewordsinredindicate:anorder,arequest,abilityorpossibility?Thewordsinredindicatepossibility.v.表明,顯示n.請(qǐng)求,要求aThatiswhyLettersfromFatherChristmascouldbetheperfectbook…bThechildrenmusthavebeenveryexcitedastheyopenedit.c…theymightnotreceivetheirpresentsiftheywerenotgood.01Discoveringtherules2)Willthemeaningofsentence(a)changeifwereplace“could”with“must”or“might”?Ifwereplace“could”with“must”,themeaningofsentence(a)willchange.aThatiswhyLettersfromFatherChristmascouldbetheperfectbook…bThechildrenmusthavebeenveryexcitedastheyopenedit.c…theymightnotreceivetheirpresentsiftheywerenotgood.01Discoveringtherules3)Whathappensifwechange“must”and“might”insentences(b)and(c)into“could”?Ifwechange“must”insentence(b)into“could”,itmeansthespeakerisnotsureaboutthestatement,andit’sonlyapossibility.aThatiswhyLettersfromFatherChristmascouldbetheperfectbook…bThechildrenmusthavebeenveryexcitedastheyopenedit.c…theymightnotreceivetheirpresentsiftheywerenotgood.01Discoveringtherules情態(tài)動(dòng)詞must,can/could,may/might均可表示推測(cè),它們可以對(duì)過(guò)去、現(xiàn)在或?qū)?lái)的情況作出語(yǔ)氣強(qiáng)弱不同的推測(cè)。1.表示肯定的推測(cè)時(shí)：各情態(tài)動(dòng)詞語(yǔ)氣從弱到強(qiáng)依次為

might→may→could→can→must；把握推測(cè)語(yǔ)氣的特點(diǎn)，選擇恰當(dāng)?shù)那閼B(tài)動(dòng)詞。02Studyingtherules表示否定的推測(cè)時(shí)：can’t/couldn’t語(yǔ)氣較強(qiáng)，意為“不可能”；maynot/mightnot語(yǔ)氣較弱，意為“可能不”。must的否定形式mustn’t不表示否定推測(cè)，而是表示“不許可”或“不應(yīng)該”。02Studyingtherules1.用于肯定句,表示客觀可能性,意為“可能”,即從理論上看是可能的,但不一定會(huì)發(fā)生

Asahumanbeing,anyonecanmakeamistake.作為人類,任何人都有可能犯錯(cuò)。2.用于否定句或疑問(wèn)句,表示對(duì)現(xiàn)在的動(dòng)作或狀態(tài)進(jìn)行主觀的猜測(cè),意為“可能”,或表示驚異、懷疑等態(tài)度。a.Hecan'thavealotofmoney.他不可能有很多錢。b.Canitbethatitwaslwhowasmistaken?難道是我弄錯(cuò)了?Grammar1

can+動(dòng)詞原形表推測(cè)could+動(dòng)詞原形,意為“可能”,可以指過(guò)去的情況,也可以指現(xiàn)在的情況,語(yǔ)氣緩和。多用于否定句或疑問(wèn)句。a.Helooksyoung.Hecouldn'tbeover50.他看起來(lái)很年輕,不可能超過(guò)50歲。b.Coulditbetrue?那可能是真的嗎?Grammar2

could+動(dòng)詞原形表推測(cè)1.表示主觀的推測(cè),意為“或許”,用于肯定句和否定句均可。

a.Hemaybeverybusynow.他現(xiàn)在可能很忙。b.Hemaynotbeathome.他可能不在家。注意:表示可能性時(shí),can't語(yǔ)氣較強(qiáng),表示“不可能”;maynot語(yǔ)氣較弱;表示“可能不,或許不”。

Grammar3

may+動(dòng)詞原形表推測(cè)might+動(dòng)詞原形,表示推測(cè),意為“可能",可以指過(guò)去的情況,也可以指現(xiàn)在的情況,但語(yǔ)氣比may更加不肯定。用于肯定句或否定句均可。a.TheymighthavealotofworktodonowbutI'mnotsure.他們現(xiàn)在可能有很多活兒要干,不過(guò)我不確定。b.Shewasafraidtheymightnotliketheidea.她擔(dān)心他們可能不喜歡這個(gè)想法。

Grammar4

might+動(dòng)詞原形表推測(cè)must+動(dòng)詞原形,表示猜測(cè),意為“準(zhǔn)是,一定”,通常用于肯定句。a.Thismustbeyourroom.這一定是你的房間。b.Lookathisnewcar.Hemusthavealotofmoney.瞧他那輛新車。他肯定很有錢。Grammar5

must+動(dòng)詞原形表推測(cè)課堂小練選詞填空(包含否定式)can,could,may,might,must(可重復(fù)選)1.Helen

goonatripwithus,butsheisn’tquitesure.2.Mysistermethimatthetheatrelastnight,sohe

haveattenededyourlecture.3.-IamsureIsawBrianintheparkthismorning.-You

beimaginingthings.HeleftforAmericalastnight.

4.We

havefacethediffcultytogether,butwhydidn’tyoutellme?

5.Ifyou_______smoke,pleasegooutside.may/mightcan’t/couldn’tmustmustcould(Atafancydressparty)Chris:Ispentagesputtingupalltheballoonsandflowerslastnight.Jean:Iexpectyouarefeelingtirednow!Chris:Yes,Iam.LookthatguyisdressedasBatman.IsthatMike?Jean:It’spossiblyhim.Checkoutthatgirloverthere.

I’msurethat’sLucy.Youmustbetirednow!Itmay/might/couldbehim.ThatmustbeLucy!Rewritetheunderlinedsentencesintheconversationusingcan/could,may/mightandmust.Chris:No,Idon’tthinkthat’sLucy.Lucyisn’tthattall.Jean:Lookatthosetwoguysdressedaschickens!Oh,they’rewavingatus!

Maybethey’refromourschool.Chris:Let’sgoandfindout.thatcan’tbeLucy!Theymay/might/couldbefromourschool.Rewritetheunderlinedsentencesintheconversationusingcan/could,may/mightandmust.Lookatthepictureandmakeasmanysentencesaspossibleusingcan/could,may/mightandmust.1.can+完成式,表示對(duì)已發(fā)生情況的推測(cè),主要用于否定句或疑問(wèn)句。a.Youcan'thaveforgottenher.你不可能已經(jīng)忘記她了。b.Wherecanshehaveputit?她到底把它放在哪兒了呢?2.could+完成式,表示對(duì)過(guò)去情況的推測(cè),多用于否定句或疑問(wèn)句。a.Hecouldnothavebeenmorethan16atthattime.他當(dāng)時(shí)不可能超過(guò)16歲。bCouldshehaveforgottenmyaddress?她會(huì)忘記我的地址嗎?Grammar6情態(tài)動(dòng)詞+完成式的用法Grammar6情態(tài)動(dòng)詞+完成式的用法情態(tài)動(dòng)詞表推測(cè)1.Heisright.2.Hemustberight.3.Hewillberight.4.Hewouldberight.5.Heoughttoberight.6.Heshouldberight.7.Hemayberight.8.Hecouldberight.9.Hemightberight.certainalmostcertainuncertain真題鏈接1.(2021?天津6月卷)-I

honestlydon’tthinkI'mgoingtobeadmitted.-Well,youneverknow!You__________abetter

impressionthanyouthink.A.mayhavemade

B.shouldhavemadeC.couldn'thavemade

D.needn'thavemade2.(江蘇巻)-I

leftmyhandbagonthetrain,

butluckilysomeonegaveittoarailwayofficial.-Howunbelievabletogetitback!