Unit2Let’scelebrate!UsingLanguage蔡文ReviewInUnit1,we’velearnedthefollowingmodals:beabletodarehadbetterneedhaveto情態(tài)動(dòng)詞表推測must,should,can,could,may,might都可表推測情態(tài)動(dòng)詞+動(dòng)詞原形情態(tài)動(dòng)詞+havedone（表示對目前的動(dòng)作或狀態(tài)進(jìn)行推測）（表示對已經(jīng)發(fā)生情況的推測）兩種情況must表推測1.

must表示推測時(shí)意為“一定，肯定”，推測的語氣最強(qiáng)。

HemustbeAmerican.(=

ItiscertainthatheisAmerican.)

他一定是個(gè)美國人。2.must表示推測時(shí)，只能用于肯定句，不用于否定句和疑問句。

如果表示“一定不，肯定不”，應(yīng)用can’t，不能用mustn’t,

mustn’t表示“禁止”

如詢問某種可能性時(shí)，應(yīng)用can。Hemustknowmyaddress.Hecan’tknowmyaddress.Canheknowmyaddress?他肯定知道我的地址。（一定）他不可能知道我的地址。（一定不）他可能知道我的地址嗎？（詢問可能性）must表推測3.must表示推測時(shí)，可以推測現(xiàn)在的情況、正在發(fā)生的情況和過去已經(jīng)發(fā)生的情況。Johnmustbeathome.Thelightison.It’s12o’clock.Theymustbehavinglunch.Itmusthaverainedlastnight,forthegroundiswet.（現(xiàn)在）（此刻）（過去）Exercise1.You______behungryafterallthatlongwalking.2.-ItmightbeJohnwhoisintheoffice.-No,it______behim.Isawhimoffattheairporthalfanhourago.3.He___________________(complete)hiswork;otherwise,hewouldn’tbeenjoyinghimselfbytheseaside.mustcan’tmusthavecompletedcan/could表推測can用于肯定句時(shí)，表示有時(shí)可能會(huì)出現(xiàn)的情況。can表示對現(xiàn)在的動(dòng)作或狀態(tài)進(jìn)行主觀的猜測時(shí)通常只用于否定句和疑問句。1.Joggingcanbeharmfultothehealth.2.Youcan’tbehungry,foryouhadlunchonlytwohoursago.3.Canhebeourteacher?4.Hecouldn’thavewatchedTVyesterdayforheknewhewouldhaveanexam.昨天他不可能看電視了，因?yàn)樗揽煲荚嚵恕an’t/couldn’thavedone表示對過去事實(shí)推測，意為“不可能做過……”。Exercise1.Althoughyou______findbargainsinLondonoccasionally,it’sgenerallynotacheapplacetoshop.2.ThankyousomuchSir!WithoutyourhelpI________________(pass)thetest.3.Mr.Smithisontimeforeverything.How__________itbethathewaslatefortheimportantmeeting?cancouldn’thavepassedcan/couldmay/might表推測1.may/might表示把握不大的推測，用于肯定句和否定句，不能用于疑問句。might在語氣上比may更委婉，表示的可能性更小。1)Hemay/mightbeAmerican.他可能是美國人。2)He

may/might

notbeathome.他也許不在家。Hemay/might

beathomenow.Hemay/mightbesleepingnow.Thesestudentsmay/mighthaveseenthefilmbefore.Hemay/mightgotoBeijingtomorrow.（現(xiàn)在）（此刻）（過去）（將來）2.may/might可以推測現(xiàn)在的情況、正在發(fā)生的情況、過去已經(jīng)發(fā)生的情況以及將來的情況。ExerciseSorry,I’mlate.I______________________

(turn)offthealarmclockandgonebacktosleepagain.2.-Excuseme.IsthistherightwaytotheChildren’sPalace?-Sorry,Iamnotsure.Butit______be.may/mighthaveturnedmight根據(jù)句意，用情態(tài)動(dòng)詞的正確形式填空。1.Idon’tknowwheresheis,she___________beinWuhan.2.Theroadiswet.It________________(rain)lastnight.3.-Lindahasgonetowork,butherbicycleisstillhere.-Oh,Iguessshe_____________________(go)bybus.5.Mike_______________(find)hiscarkey,forhecametoworkbybusthismorning.may/mightmusthaverainedmay(might)havegonecan’thavefoundP22Rewritetheunderlinedsentencesintheconversationusingcan/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.Activity2Lookatthepictureandmakeasmanysentencesaspossibleusingcan/could,may/mightandmust.Example:Thecustomersmusthavegotupveryearly.Activity3Grammar:Modals(2)Themanwithawalletinhishandmightbeabitunwillingtopay.Grammar:Modals(2)Thewomaninredmustbeveryexcitedtobuysomanythings.Grammar:Modals(2)Thewomanwithglassesmaybeverytiredtogetupsoearlyandcarrysomanybags.Grammar:Modals(2)Thecashiermightbefeeling

uncomfortableasheissweatingalot.Grammar:Modals(2)1.ThatiswhyLettersfromFatherChristmascouldbe/mustbe/mightbetheperfectbook...那就是為什么《圣誕老人的來信》可能/一定/或許是一本完美之書……couldbe:indicatepossibilitymustbe:indicatesurenessmightbe:indicatelesspossibility情態(tài)動(dòng)詞+動(dòng)詞原形，表示對現(xiàn)在的推測Grammar:Modals(2)2.Thechildrenmusthavebeen/couldhavebeen/mighthavebeenveryexcitedastheyopenedit.孩子們打開它的時(shí)候一定/可能/或許很興奮。musthavebeen:quitesureaboutthestatementcouldhavebeen:notverysureaboutthestatementmighthavebeen:notsureaboutthestatement情態(tài)動(dòng)詞+完成式，表示對已發(fā)生情況的推測Grammar:Modals(2)3....theymight/could/mustnotreceivetheirpresentsiftheywerenotgood.如果他們表現(xiàn)不好，他們可能收不到/就收不到/絕不能收到禮物。mightnot:indicatepossibilitycouldnot:indicateimpossibilitymustnot:theyarenotallowedtoreceivethepresentsGrammar:Modals(2)情態(tài)動(dòng)詞(modals)沒有人稱、數(shù)的變化必須和其他動(dòng)詞一起構(gòu)成謂語用來表示態(tài)度、愿望、推測情態(tài)動(dòng)詞對現(xiàn)在和未來的推測對過去的推測使用句型mustmust+動(dòng)詞原形musthavedone肯定句may/mightmay/might+動(dòng)詞原形may/mighthavedone肯定句，否定句can/couldcan/could+動(dòng)詞原形can/couldhavedone否定句，疑問句（could可用于肯定句）should用來表示一種估計(jì)的情況“按理會(huì)+估計(jì)會(huì)”should+do/beshouldhavedone肯定句，否定句，疑問句表推測時(shí)，英語中只使用must>may>might>maynot>can't這五個(gè)表達(dá)的語氣依次遞減：must：一定（語氣肯定）>may：也許（不很肯定）>might：或許（比may語氣更弱）

>maynot：也許不（表否定）>can't：一定不（must的反義）Conclusion

1.---I

wonderwhySaralooksworriedtoday.---I’mnotsure,butshe_____asmallaccidentdrivinghere.A.couldhave B.mighthave C.mighthavehad D.musthavehad2.Helen____goonthetripwithus,butsheisn’tquitesureyet.A.shall B.must C.may D.can3.Itwasaredlight,William.You____thecar.---