Unit2Let'scelebrate!Usinglanguage课件高中英语

Unit2Let’scelebrate!UsinglanguagebyAdaUsinglanguageModels(2)

1Lookatthesentencesfromthereadingpassageandanswerthequestions.a.That’swhyLettersfromFatherChristmas

couldbetheperfectbook...b.Thechildrenmusthavebeenveryexcitedastheyopenedit.c....theymightnotreceivetheirpresentsiftheywerenotgood.UsinglanguageModels(2)

1Lookatthesentencesfromthereadingpassageandanswerthequestions.1.Whatdothewordsinboldindicate:anorder,arequest,abilityorpossibility?Thewordsinboldindicatepossibility.UsinglanguageModels(2)

1Lookatthesentencesfromthereadingpassageandanswerthequestions.2.Willthemeaningofsentence(a)changeifwereplace”could”with“must”or“might”?Yes,itwill.UsinglanguageModels(2)

1Lookatthesentencesfromthereadingpassageandanswerthequestions.3.Whathappensifwechange“must”and“might”insentences(b)and(c)into“could”?Ifwechange“must”insentence(b)into“could”,itmeansthespeakerisnotsureaboutthestatement,andit'sonlyapossibility.Ifwechange"might"insentence(c)into"could”,itmeansit'simpossibleforthechildrentoreceivetheirpresents.Usinglanguage

Models(2)2.Rewritetheunderlinedsentencesintheconversationusingcan/could,may/mightandmust.(Atafancydressparty)Chris:Ispentagesputtingupalltheballoonsandflowerslastnight.Jean:Iexpectyouarefeelingtirednow!Chris:Yes,Iam.Look,thatguyisdressedasBatman.IsthatMike?Jean:It’spossiblyhim.Checkoutthatgirloverthere.

I’msurethat’sLucy.Chris:No,Idon’tthinkthat’sLucy.Lucyisn’tthattall.Jean:Lookatthosetwoguysdressedaschickens!Oh,they’rewavingatus.Maybethey’refromourschool.Chris:Let’sgoandfindout.Youmustbetirednow.Itmay/might/couldbehim.ThatmustbeLucy.Thatcan’tbeLucy.Theymay/might/couldbefromourschool.Usinglanguage

Models(2)3.Lookatthepictureandmakeasmanysentencesaspossibleusingcan/could,may/mightandmust.BlackFridayisoneofthebusiestshoppingdaysoftheyear.Storeshavebigsalesandopentheirdoorsveryearly.Thewomaninredmustbeveryexcitedtobuysomanythings.Themanwithawalletinhishandmightbeabitreluctanttopay.Usinglanguage

2.常用的情态动词包括：can(could),may(might),will(would),shall(should),must,need,dare,hadbetter,oughtto,usedto等。Modals情态动词1.本身具有一定的词义，不能独立作谓语，必须和动词原形一起构成谓语。Usinglanguage

3.Modalsindicatepossibility.情态动词+动词原形1)can+动词原形A.用于肯定句，表示客观可能性，意为“可能”,从理论上看是可能的，但不一定会发生。作为人类，任何人都有可能犯错。Asahumanbeing,anyonecanmakeamistake.Usinglanguage

3.Modalsindicatepossibility.1)can+动词原形B.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.他不可能有很多钱。Hecan'thavealotofmoney.Usinglanguage

3.Modalsindicatepossibility.2)may+动词原形表示主观的推测，意为“或许”用于肯定句和否定句均可。他现在可能很忙。Hemaybeverybusynow.他可能不在家。Hemaynotbeathome.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”。Usinglanguage

3.Modalsindicatepossibility.3)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。他们现在可能有很多活儿要干，不过我不确定。TheymighthavealotofworktodonowbutI'mnotsure.Usinglanguage

3.Modalsindicatepossibility.4)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。他看起来很年轻，不可能超过50岁。Helooksyoung.Hecouldn'tbeover50.Usinglanguage

3.Modalsindicatepossibility.5)must+动词原形表示猜测，意为“准是，一定”通常用于肯定句。瞧他那辆新车。他肯定很有钱。Lookathisnewcar.Hemusthavealotofmoney.Usinglanguage

3.Modalsindicatepossibility.情态动词+完成式1)must+havedone表示对已发生情况的推测，通常用于肯定句。Shemusthavegonehome.她肯定已经回家了。Usinglanguage

3.Modalsindicatepossibility.2)can+havedone表示对已发生情况的推测，主要用于否定句或疑问句。Youcan'thaveforgottenher.你不可能已经忘记她了。Usinglanguage

3.Modalsindicatepossibility.3)could+havedone表示对过去情况的推测，多用于否定句或疑问句。Hecouldnothavebeenmorethan16atthattime.他当时不可能超过16岁。Usinglanguage

3.Modalsindicatepossibility.4)may/might+havedone表示对已发生事情的不肯定的推测，might相比may语气更加不肯定。他可能是坐火车来的。Usinglanguage

3.Modalsindicatepossibility.Exercises

1.[2020·天津卷]Jimsayswe

stayinhishouseaslongasweleaveitcleanandtidy.2.[2020·全国Ⅲ卷]ThewiseoldmantoldhimtotraveltotheLiRiver—perhapshe

learnalittlefromthegreatestartistintheworld.3.[2020·新高考全国Ⅰ卷]Doyouwanttobeagoodpublicspeaker?Herearesomeprinciplesyou

master.can/maycouldmustUsinglanguage

3.Modalsindicatepossibility.Exercises

havedonecancanUsinglanguage

3.Modalsindicatepossibility.Exercises

7.[