Unit+2+Let's+celebrate!+Using+language高一英语外研版（2019）必修第二册+

Whatisit?GuessItmaybe...Itcan'tbe...Itmustbe...Itcouldbe...Lookatthesentencesfromthereadingpassageandanswerthequestions.Activity1aThatiswhyLettersfromFatherChristmascouldbetheperfectbook…bThechildrenmusthavebeenveryexcitedastheyopenedit.c…theymightnotreceivetheirpresentsiftheywerenotgood.1.ThatiswhyLettersfromFatherChristmascouldbetheperfectbook...那就是为什么《圣诞老人的来信》可能是一本完美之书……2.Thechildrenmusthavebeenveryexcitedastheyopenedit.当孩子们打开它的时候一定很兴奋。3....theymightnotreceivetheirpresentsiftheywerenotgood.如果他们表现不好，他们可能收不到礼物。3....theymightnotreceivetheirpresentsiftheywerenotgood.如果他们表现不好，他们可能收不到礼物。2.Thechildrenmusthavebeenveryexcitedastheyopenedit.当孩子们打开它的时候一定很兴奋。1.ThatiswhyLettersfromFatherChristmascouldbetheperfectbook...那就是为什么《圣诞老人的来信》可能是一本完美之书……Whatdothewordsinblueindicate:anorder,request,abilityorpossibility?Lookatthesentencesfromthereadingpassageandanswerthequestions.Activity1aThatiswhyLettersfromFatherChristmascouldbetheperfectbook…bThechildrenmusthavebeenveryexcitedastheyopenedit.c…theymightnotreceivetheirpresentsiftheywerenotgood.命令要求能力可能性couldbe

:indicatepossibilitymustbe:indicate

surenessmightbe

:indicatelesspossibility情态动词+动词原形，表示对现在的推测2.Thechildrenmusthavebeen

veryexcitedastheyopenedit.当孩子们打开它的时候一定很兴奋。Possibility:______>_________>____________mustcan/couldmay/mightnot>_____________>_____________can’t/couldn’tmay/mightTranslationThatiswhyLettersfromFatherChristmascouldbetheperfectbook...Thechildrenmusthavebeenveryexcitedastheyopenedit.这就是为什么《圣诞老人的来信》可能是一本完美的书。孩子们打开它的时候一定很兴奋。情态动词+do，表示对现在的推测情态动词+havedone，表示对已发生情况的推测情态动词(modals)没有_____、_____的变化必须和____________构成谓语用来表示______、_______、______人称数其他动词态度愿望推测musthavebeen:quitesureaboutthestatement（十分肯定）couldhavebeen:notverysureaboutthestatement（不是非常确定）mighthavebeen:notsureaboutthestatement（不确定）情态动词+现在完成时（have+动词的过去分词），表示对已发生情况的推测情态动词+动词原形can肯定句表示客观可能性，意为“可能”Asahumanbeing,anyonecanmakeamistake.否定句/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”Hecan’thavealotofmoney.情态动词+动词原形could意为可能语气缓和Hecouldbeonhiswayhome.may意为也许，可能语气较弱Hemaybeverybusynow.might意为或许，可能语气比may更弱Theymighthavealotofworktodonow

butI’mnotsure.情态动词+动词原形must肯定句表示猜测，意为“准是，一定”Lookathisnewcar.Hemusthave

alotofmoney.否定句

意为“禁止，不允许”Hemustnotleavehisroom.情态动词+完成式can否定句过去不可能做Hecan’thaveforgotten

it.could肯定句过去有可能做Shecouldhavegone

outwithsomefriends.may/might肯定句过去也许做了It’stoolate.Ithinkhemayhavegone

tobed.must肯定句过去一定做了Itmusthaverainedlastnight,fortheroadiswet.Pleaserewritetheunderlinedsentencesintheconversationusingcan/could,may/might

andmust.(P22)Chris:Ispentagesputtingupallthe

balloonsandflowerslastnight.Jean:Iexpectyouarefeelingtirednow!Chris:Yes,Iam.Look,thatguyisdressedasBatman.IsthatMike?Jean:It’spossiblyhim.

Checkoutthatgirlovertheredressedasabride.I’msurethat’sLucy.Youmustbetirednow!Itmay/might/couldbehim.ThatmustbeLucy.Chris:No,Idon’tthinkthat’sLucy.

Lucyisn’tthattall.Jean:Lookatthosetwoguysdressedaschickens!Oh,they’rewavingatus!Maybethey’refromour

school.Chris:Let’sgoandfindout.thatcan’tbeLucy.Theymay/might/could

befromourschool.

Lookatthepictureandmakeasmanysentencesaspossibleusing

can/could,may/might

andmust.(P22)Activity3Lookatthepictureandmakeasmanysentencesaspossibleusingcan/could,may/mightandmust.Groupwork

Themanwithawalletinhishandmightbeabitunwillingtopay.

Thewomaninredmustbeveryexcitedtobuysomanythings.

Thewomanwithglassesmaybevery