Unit2Let'scelebrateUsinglanguage情态动词课件高中英语

Unit2Let’scelebrateModals(2)回归第1单元学习的情态动词can,couldmust,havebeabletodareneedLookatthesentencesfromthereadingpassageandanswerthequestions.aThatiswhyLettersfromFatherChristmascouldbetheperfectbook…bThechildrenmusthavebeenveryexcitedastheyopenedit.c…theymightnotreceivetheirpresentsiftheywerenotgood.01Discoveringtherules1)Whatdothewordsinredindicate:anorder,arequest,abilityorpossibility?Thewordsinredindicatepossibility.v.表明,显示n.请求,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情态动词must,can/could,may/might均可表示推测,它们可以对过去、现在或将来的情况作出语气强弱不同的推测。1.表示肯定的推测时：各情态动词语气从弱到强依次为

might→may→could→can→must；把握推测语气的特点，选择恰当的情态动词。02Studyingtherules表示否定的推测时：can’t/couldn’t语气较强，意为“不可能”；maynot/mightnot语气较弱，意为“可能不”。must的否定形式mustn’t不表示否定推测，而是表示“不许可”或“不应该”。02Studyingtherules1.用于肯定句,表示客观可能性,意为“可能”,即从理论上看是可能的,但不一定会发生

Asahumanbeing,anyonecanmakeamistake.作为人类,任何人都有可能犯错。2.用于否定句或疑问句,表示对现在的动作或状态进行主观的猜测,意为“可能”,或表示惊异、怀疑等态度。a.Hecan'thavealotofmoney.他不可能有很多钱。b.Canitbethatitwaslwhowasmistaken?难道是我弄错了?Grammar1

can+动词原形表推测could+动词原形,意为“可能”,可以指过去的情况,也可以指现在的情况,语气缓和。多用于否定句或疑问句。a.Helooksyoung.Hecouldn'tbeover50.他看起来很年轻,不可能超过50岁。b.Coulditbetrue?那可能是真的吗?Grammar2

could+动词原形表推测1.表示主观的推测,意为“或许”,用于肯定句和否定句均可。

a.Hemaybeverybusynow.他现在可能很忙。b.Hemaynotbeathome.他可能不在家。注意:表示可能性时,can't语气较强,表示“不可能”;maynot语气较弱;表示“可能不,或许不”。

Grammar3

may+动词原形表推测might+动词原形,表示推测,意为“可能",可以指过去的情况,也可以指现在的情况,但语气比may更加不肯定。用于肯定句或否定句均可。a.TheymighthavealotofworktodonowbutI'mnotsure.他们现在可能有很多活儿要干,不过我不确定。b.Shewasafraidtheymightnotliketheidea.她担心他们可能不喜欢这个想法。

Grammar4

might+动词原形表推测must+动词原形,表示猜测,意为“准是,一定”,通常用于肯定句。a.Thismustbeyourroom.这一定是你的房间。b.Lookathisnewcar.Hemusthavealotofmoney.瞧他那辆新车。他肯定很有钱。Grammar5

must+动词原形表推测课堂小练选词填空(包含否定式)can,could,may,might,must(可重复选)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,表示对已发生情况的推测,主要用于否定句或疑问句。a.Youcan'thaveforgottenher.你不可能已经忘记她了。b.Wherecanshehaveputit?她到底把它放在哪儿了呢?2.could+完成式,表示对过去情况的推测,多用于否定句或疑问句。a.Hecouldnothavebeenmorethan16atthattime.他当时不可能超过16岁。bCouldshehaveforgottenmyaddress?她会忘记我的地址吗?Grammar6情态动词+完成式的用法Grammar6情态动词+完成式的用法情态动词表推测1.Heisright.2.Hemustberight.3.Hewillberight.4.Hewouldberight.5.Heoughttoberight.6.Heshouldberight.7.Hemayberight.8.Hecouldberight.9.Hemightberight.certainalmostcertainuncertain真题链接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.(江苏巻)-I

leftmyhandbagonthetrain,

butluckilysomeonegaveittoarailwayofficial.-Howunbelievabletogetitback!