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Module6TheTangPoemsSectionⅢGrammar——情态动词语境自主领悟先观察原句后自主感悟①Thetopicofthepoemcan'tbetravel.②Itmustbesomethingmorepersonal.③Itmaybefriendship.④Itmightbethejourneythroughlife.⑤LiBaimusthavehadastrangelife.⑥Hecan'thavebeeninterestedinanormaljob.1.句①－⑦中黑体部分在句中均作；其中句⑤－⑦表示对所发生的事情的推测。过去推测⑦Hemayhavediedwhenhefelloutofaboat.⑧Youshouldreadthepoemsometime.⑨Couldyouanswerafewquestions，please？⑩Itoldhertostopsinging，butshewouldn'tlisten.2.句⑧表示说话人的意愿，意为“应该”，句⑨表示“请求”，句⑩表示_____。意愿语法精要点拨考点一情态动词表推测1．情态动词表推测的三种句式(1)在肯定句中一般用must(一定)，may(可能)，might/could(也许，或许)。Atthistimemyfathermustbeworkinginhisoffice，isn'the?在这个时候，我父亲一定正在办公室工作，是吗？Hewasafraidtheymightnotagreewithhim.他担心他们可能不同意他的意见。(2)否定句中用can't/couldn't(不可能)，maynot/mightnot(可能不)。Theycan'tbeatworknow，forIsawthemeatingintherestaurantjustnow.他们现在一定没有在上班，因为我刚才看见他们在餐馆吃饭。Hemay/mightnotknowthescientist.他也许不认识那位科学家。(3)疑问句中用can/could(能)。Couldhehavefinishedthetask?他可能把任务完成了吗？Canhebeathomenow?他现在能在家吗？[即时演练1]用适当的情态动词填空①Hebeill.Helookssopale.②Hewasafraidtheynotagreewithhim，butIamnotquitesure.③Itnotbetheheadmaster.HehasgonetoAmerica.④Someoneisknockingatthedoor.Whoitbe?canmustmightcan/could2．情态动词表推测的三种时态(1)对将来情况的推测，用“情态动词＋动词原形”。Shemust/may/mightarrivebefore5：00.5点前她一定/可能/也许到。(2)对现在或一般情况的推测，用“情态动词＋be”“情态动词＋bedoing”或“情态动词＋动词原形”。Atthismoment，ourteachermust/may/might/couldbecorrectingourexampapers.这时，我们老师一定/可能/也许在批改试卷。Mr.Bushisontimeforeverything.Howcan/couldhebelatefortheopeningceremony?布什先生一向准时，这次开幕式他怎么可能迟到呢？(3)对过去情况的推测，用“情态动词＋have＋过去分词”。Ididn'thearthephone.Imusthavebeenasleep.我刚才没有听到电话，我想必是睡着了。Thedoorislocked.Hecannothavebeenathome.门锁着，他不可能在家。[即时演练2]单句语法填空①Listen，hemust(read)English.②Sincenobodygavehimanyhelp，hemust(do)theresearchonhisown.③Itisimportanttoknowabouttheculturaldifferencesthatmay_________(cause)problems.causebereadinghavedone3．情态动词表推测的特殊用法(1)can除了表推测，用于疑问句和否定句中外，还可以表示“在某段时间内一时的可能性”。Itcanbequitewindythere，especiallyinspring.那里有时容易刮风，特别在春季。(2)must表示“一定，非得；偏要”，强烈语气。Ifyoumustsmoke，youcansmokeinthatroom.如果你偏要吸烟，你可以在那个房间吸。考点二情态动词could，should和would的用法1．could的用法(1)could表示推测，表示某事有可能发生或可能是事实。在肯定句中没有must那么有把握；在否定句中没有can't那么有把握。Hecouldn'tbeabadman.他不大可能是坏人。(2)could还可以用于表示客气、委婉或礼貌的请求语气。Excuseme，couldyoutellmethewaytothebusstation?请问你能否告诉我去车站的路？I'mafraidthatwecouldn'tgiveyouanydefiniteansweratthismoment.恐怕我们这时还无法给您任何确切的答复。(3)couldhavedone表示“可能已经……”。此外，它还可以表示“本能够做某事(而没有做)”，暗含惋惜之情。Youcouldhavedoneitwell，butyouweretoocareless.你本可以做好的，但是你太马虎了。Wherecouldshehavegonelastnight?她昨晚可能到哪里去了呢？2．should的用法(1)表示义务、建议、劝告，意为“应该”，用于各种人称。其同义词是oughtto。Everycitizenshouldobeythelaw.每个公民都应当遵守法律。(2)表示推测：用于肯定句，表示按常规、常理的推测，意为“按理说应该”。IfallgoesaccordingtoplanweshouldbeinShanghaitomorrow.如果一切按照预定的计划进行，明天我们就在上海了。(3)表示说话人对某事不能理解，感到意外、惊异等意思。意为“竟会”。It'sstrangethatheshouldbelate.真奇怪，他竟会迟到。(4)用于从句中表示虚拟语气。Ifitshouldraintomorrow/Shoulditraintomorrow，don'texpectme.万一明天下雨，就不要等我了。(5)shouldhavedonesth.表示“本应该做某事，但事实上却没有做”；shouldn'thavedonesth.表示“本不该做某事，但事实上做了”。Youshouldhavegotupearlier.你本应该早点起床的。3．would的用法(1)表示请求、建议等，would比will委婉客气。在疑问句中用于第二人称。Wouldyoupleaselendmeyourpencil?请把铅笔借给我用用好吗？(2)表示意愿，在陈述语气和虚拟语气中都可用。Hewouldnotleavebeforehefinishedhiswork.他在完成工作以前不愿离开。(3)表示过去的习惯、例行的活动或过去的一种倾向。Hewouldsitatthetable，deepinthought.他总是坐在桌边，陷入沉思。(4)用在虚拟语气的主句中。Ifyouwenttoseehim，hewouldbedelighted.如果你去看他，他一定非常高兴。Shewouldhavecomeifshehadn'tbeensobusy.要不是因为忙她就来了。[即时演练3]选词填空：could，should，would①Thedoornotopen，nomatterhowhardshepushed.②Youcan'timaginethatawellbehavedgentlemanbesorudetoalady.③Inothaveenjoyedmyselfmore－itwasaperfectday.couldwouldshould语法应用落实单句语法填空1．Itnotbeourheadmaster.HehasgonetoAmerica.2．WhyyouinterruptmewhileI'mwatchingTV?3．Iwassurprisedthathepasstheexam.4．Ilovetheweekend，becauseIgetupearlyonSaturdaysandSundays.5．Itwasreallyannoying；Igetaccesstothedatabankyouhadrecommended.canmustshouldneedn'tcouldn't6．ThetrainistostartsoonandMikehasn'tarrived.Whathavehappenedtohim?7．Ihavehandedinmyhomeworkyesterday，butunfortunatelyIforgotaboutittotally.8．—Shelooksveryhappy.Shehavepassedtheexam.—Iguessso.It'snotdifficultafterall.mustcanshould9．Itsoundlikeaperfectdestination，butitisreallyadventuroustogothere.10．Whenhewasthere，hegotothatcoffeeshopatthecornerafterworkeveryday.wouldmay11．Hemust(put)hiswalletsomewhereelselastnight.12．Someonehascleanedtheroom.Whoitbe?13．Hecomethisafternoon，buthesaidhewasn'tcertainwhathisplanswere.14．MyMP5isn'tinmybag.WhereIhaveputit?15．Whenhelivedinthecity，hegototheparkeveryday.haveputcan/couldmay/mightcan/couldwould16．I'msurprisedthathespeaktohismotherinthatway.17．Youhavepassedtheexam，butyouweretoocareless.18．Hewasableescapefromtheburningbuilding.shouldcouldto