Unit2Let'sCelebrate!UsinglanguageModalverbs课件-高一英语2

Unit2Let’scelebrate!

UsinglanguageGrammar:Modals(2)情态动词(modals)没有人称、数的变化必须和其他动词一起构成谓语用来表示态度、愿望、推测Modals(2)1a

ThatiswhyLettersfromFatherChristmas

could

betheperfectbook...b

Thechildrenmusthavebeenveryexcitedastheyopenedit.c

...theymightnotreceivetheirpresentsiftheywerenotgood.Lookatthesentencesfromthereadingpassageandanswerthequestions.1Whatdothewordsinboldindicate:anorder,arequest,abilityorpossibility2Willthemeaningofsentence(a)changeifwereplace“could”with“must”or“might”3Whathappensifwechange“must”and“might”insentences(b)and(c)into“could”Nowlookformoresentenceswithmodalsinthereadingpassage.Focuson基本用法Modalverbscan&couldmay&mightmust情态动词+havedone情态动词表推测情态动词must,can,could,may,might等都有表推测的用法，都可以对过去，现在或将来的情况是否发生做出语气强弱不同的推测。Focuson基本用法1.在肯定句中表推测:(1)Youmusttellmeallaboutyournewfriend.

根据推测语气的强弱，选择情态动词。(2)Hecouldbeathome.Hemaybeathome.Hemightbeathome.你必须告诉我有关你新朋友的一切。他可能在家。could,may,might语气依次减弱，表示“可能，也许”。must语气最强，表示“肯定，一定”；(非常肯定)（很可能）（仅仅可能而已）（或许,非常不确定）2.在否定句中表推测:(1)Itcan'tsnowinsummer.may/mightnot语气较弱，表示“可能不”；mustn’t表示“禁止”，不用于否定推测。我们可能哪里也去不成。(2)Wemightnotgoanywhere.Youmustn'ttellalietoparents.夏天不可能下雪。你不能对父母说谎。can’t,couldn’t语气较强，表示“不可能”；【情态动词】一、情态动词can与could的用法1.表示能力:

can用来表示现在的能力,could表示过去的能力。e.g.MygrandmothercandosomeshoppingontheInternet,butshecouldn’tlastyear.我奶奶会网购了,但是去年她还不会。2.表示理论上或习惯上（客观上）的可能性,意为“可能会”。e.g.Asahumanbeing,anyonecanmakeamistake.

作为人类，任何人都有可能犯错。

Accidentscanhappytoanydrunkendriver.

任何醉酒的司机都有可能发生事故。3.表示推测,意为“可能”。多用于否定句或疑问句。e.g.—Canthenewsbetrue——这个消息可能是真的吗—Itcan’tbetrue.——它不可能是真的。e.g.Thatcan’tbeMary--she’sinNewYork.有人在敲门,他可能是谁呢4.表示请求和许可:could语气比can委婉,但回答时只能用can。e.g.CanIgonow现在我可以走了吗e.g.—CouldIcometoseeyoutomorrow——明天我可以来看你吗—Yes,youcan.(否定答语可用No,I’mafraidnot.)——是的,可以。5.习惯用法“cannot...too...”表示“无论怎样……都不过分,越……越好”。有时cannot可用cannever替代。e.g.Wecannotthankyoutoomuchforwhatyou’vedoneforus.对于你们为我们所做的一切,我们怎么感激你们都不过分。选出下列句中can/could的含义。A.表示能力 B.表示推测C.表示请求和许可 D.表示理论或习惯上的可能性(1)Can/CouldIuseyourdictionary (2)AnEnglishmanwhocouldnotspeakItalianwasoncetravelinginItaly. (3)Marycouldn’thavereceivedmyletter,otherwiseshewouldhaverepliedbeforenow. (4)Everybodycanmakemistakes.(C)(A)(B) (D)二、情态动词may与might的用法表示征求对方的同意或许可2.或允许对方做某事(不用might)。e.g.—May/MightIplaythecomputergamesaftersupper—Yes,youmay./No,youmustn’t/can’t.(否定句用mustn’t或can’t)——晚饭后我可以玩电脑游戏吗——是的,可以。/不,不行。e.g.Youmaychoosewhateveryoulike.你喜欢什么就选择什么。3.表示推测(把握不大),意为“可能”,多用于肯定句。(might比may可能性更小)e.g.Thetrafficisveryheavythesedays.Imayarriveabitlate,socouldyousavemeaplace这些天交通很拥挤,我可能会来晚一点,请你帮我留个位置好吗e.g.Shemightgooutbecausethephonewasringingallthetime.她可能出去了,因为一直在响。

4.may用于祈使句,表示祝愿。e.g.Mayyoureturnsoon.

愿你早日归来。5.“may/mightaswell+动词原形”表示“不妨,还不如”。e.g.It’snotveryfar,sowemay/mightaswellgoonfoot.

那地方不太远,所以我们还是走着去吧。选出下列句中may/might的含义。A.表示许可B.表示推测C.表示祝愿(1)Ithinkhemaycometomorrow.(2)Mayyougoodluck! (3)MayIwatchTVnow (B)(C)(A)三、情态动词must的用法1.表示“必须”,语气比should,oughtto强烈。其否定形式为mustn’t(不准;禁止)。e.g.Youmustn’tdothat,becauseyoumustkeepyourword.

你不能那么做,因为你得遵守诺言。表示肯定的推测时：情态动词语气从弱到强依次为might→may→could→can→must；【要点提示】以must开头的一般疑问句的肯定回答中要用must,否定回答中要用needn’t/don’thaveto。e.g.—MustIfinishthepapertoday—Yes,youmust./No,youneedn’t/don’thaveto.——今天我必须完成论文吗——是的,你必须。/不,你不必。2.表示有把握的肯定推测,只能用在肯定句中,意为“一定;准是”;在否定句、疑问句中要用can’t代替。e.g.Youhaveworkedhardallday.Youmustbetired.你辛苦工作一整天了,一定累了。(对现在情况的推测判断)e.g.Youmusthavereadwidelyandputalotofworkintoit.你一定进行了广泛阅读并投入了大量的工作。(对过去情况的推测)3.表示感情色彩,意为“偏偏;偏要”,常指令人不快的事情。e.g.ThecarmustbreakdownjustwhenIwasabouttostart.我正要出发时车偏偏抛锚了。4.mustnot表示禁止,意思是“不准”“不许”“千万不要”等。e.g.Youmustn’tdriveintoastreetwitha“noentry”sign.

你切勿把车驶进有“不得进入”标示的街道。选出下列句中must/mustn’t的含义。A.表示“必须”B.表示“一定;准是”C.表示“偏要;硬要;偏偏”D.表示“禁止,不许,不准”(1)Youmustn’tfirewithoutmysignal. (2)Whymustyoualwaysinterruptme (3)Youmustbehungryafterallthatwalking. (4)YoumustpracticeyourspokenEnglishifyouwanttoimprove. (D)(C)(B)(A)四、情态动词+havedone“can/could/may/might/must+havedone”表示对过去事情的推测。各情态动词的表示推测的用法如下表:形式用法musthavedone过去肯定做过can’t/couldn’thavedone肯定没做过(否定句)can/could+主语+havedone?可能做过吗(疑问句)may/mighthavedone或许/可能做过某事①musthavedone表示对过去发生的事情十分肯定的推测。②can/couldhavedone表示“本来能够做某事但却未做”或表推测。③may/mighthavedone用于肯定句和否定句，表示对过去发生某事的可能性的推测。④should/oughttohavedone表示“本该做某事而实际上未做”;否定式表示“本不该做但却做了”。⑤needn'thavedone表示“做了本来不必做的事”。Fromwhatyousaid,shemusthavetoldyouallaboutit.从你所说的来看,她一定把一切都告诉你了。(只能用在肯定句中)e.g.Hecan’thavefinishedthetaskinsuchashorttime.他不能在如此短的时间内完成这项任务。(只能用在否定句)e.g.Canhehavetoldyouthesecretyesterday昨天他可能告诉过你那个秘密吗(用在疑问句)用适当的情态动词填空。(1)He_____________haveforgottenit.Itoldhimjustnow.(2)It’stoolate;Ithinkhe__________havegonetobed.

(3)Marywenthome.She_____havefinishedherwork.can’t/couldn’tmay/mightmust

情态动词+havedone”表示虚拟语气的用法:couldhavedone表示本来能够做某事但没做(用于肯定句中)should/oughttohavedone表示本应该做某事但没做,其否定式表示本不该做但却做了mighthavedone表示本可以做某事但没做needn’thavedone表示本没有必要做某事但做了e.g.Youshouldn’thavetoldherthetruth.

你本不该告诉她真相。e.g.Icouldhavegivenhimsomehelp,butIwasbusythen.我本能够给他一些帮助,但是当时太忙了。e.g.Youneedn’thavecome,itisSunday.你本没必要来,今天是星期天。Ⅰ.用适当的情态动词填空1.Where_________youhavegonetoI________findyoujustnow.

2.You____takewhateveryoulike.3.You__________aswellstaywhereyouareanditiseasyformetoseeyou.4.—_____Ihandinmyhomeworktonight—No,you_______.You____handitintomorrow.5.HespeaksEnglishfluently.He_____havelearnedEnglishbefore.6.MayIcomeinYes,you____.can/couldcouldn’tmaymay/mightMustneedn’tcanmustmay7.You_____betoocarefultocrosstheroad.8.Generallyspeaking,itiswarminspringbutit____beverycoldinsomebadweather.9.____ourfriendshiplastlong.

10.Why_____yousmokeinthemeetingroomcan’tcanMaymustRewritetheunderlinedsentencesintheconversationusingcan/could,may/mightandmust.2(Atafancydressparty.)Chris:Ispentagesputtingupalltheballoonsandflowerslastnight.Jean:Iexpectyouarefeelingtirednow！Chris:Yes,Iam.Look,thatguyisdressedasBatman.lsthatMikeJean:It'spossiblyhim.Checkoutthatgirlovertheredressedasabride.I'msurethat'sLucy.Chris:No,Idon'tthinkthat'sLucy.Lucyisn'tthattall.Jean:Lookatthosetwoguysdressedaschickens!Oh,they'rewavingatus!Maybethey'refromourschool.Chris:Let'sgoandfindout.Activity2Practice(Atafancydressparty.)Chris:Ispentagesputtingupalltheballoonsandflowerslastnight.Jean:Iexpectyouarefeelingtirednow!Chris:Yes,Iam.Look,thatguyisdressedasBatman.IsthatMikeJean: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.Thatmustbethatcan’tbeLucy.Theymay/might/couldbefromourschool.Lookatthepictureandmakeasmanysentencesaspossibleusingcan/could,may/mightandmust.3Culturenote:BlackFridayGrammar:Modals(2)Themanwithawalletinhishandmightbeabitunwillingtopay.Grammar:Modals(2)Thewomaninredmustbeveryexcitedtobuysomanythings.Grammar:Modals(2)Thewomanwithglassesmaybeverytiredtogetupsoearlyandcarrysomanybags.Grammar:Modals(2)Thecashiermightbefeeling

uncomfortableasheissweatingalot.LanternFestivalcelebrationsUnderlinethewordsandexpressionsaboutcelebrationsduringtheLanternFestivalinthespeechbubblesandcompletethemindmap.Addanymoreyoucanthinkof. 4flowers,ascarfaredenvelope(adress,chocolates)riceballs(dumplingsnoodles)balloonsposters(bannersflowers)holdalanternfairholdalanternriddlescompetitionletofffireworks(parade,haveareuniondinner)Describeafestivalcelebrationusingthewordsandexpressionsyouhavelearnt.Tocelebrate...，weoftendrink/eat...，give...asgifts，decoratewith...

5DidYouKnow?

Traditionally,

peoplesendwritteninvitationsforformaleventssuchasweddings.Similarly,

theseinvitationsareansweredinwriting.Formoreinformalevents,however,

spokeninvitationsaremorecommon.Remembertoarriveontimeifyouaccepttheinvitation.Dependingonregionalcustoms,itmaybeacceptabletobe15to30minuteslate.ltisnotadvisabletobeearly,asthehostmaynotbeready.AfestivalinvitationListentotheconversationandcompletethesentenceswiththecorrectending.1

Tonywouldliketo

.2

Hugowantstofindout

.3

Onthatdaytheywill

.a

gotoHugo’sapartmenttogivethanksb

inviteHugotohisapartmenttocelebrateThanksgiving c

whatheneedstobring