人教版必修三unit1-情态动词公开课课件

情态动词的特征：1.情态动词有一定的词义，但不完整，不能单独做谓语，它们和实义动词或者系动词连用构成谓语动词。2.无人称和数的变化，但有些情态动词，有时态的变化。3.情态动词后接动词原形4.情态动词的否定式在其后加not.情态动词的用法：1.can一般表示与生俱来的能力或者一种客观可能性,还可以表示请求和允许。LearningEnglish_____bedifficult.canMancannotlivewithoutair._______Iuseyourbike?Cancan/could:can/could:2.在疑问句中，用could可表示请求，语气较委婉。—____Ihavethetelevisionon?—Yes,you_____./No,you_____CouldHeasksifhe____smokehere.couldcan/maycan’t/I’mafraidnotcan/could:3.表示惊异、怀疑、不相信的态度。（主要用在否定句、疑问句或惊叹句中）He’ssuchanicepersonthathe______committhecrime!can’t你怎么会如此地粗心！Howcanyoubesocareless!Canthisbetrue?can/could:4.cannever/can’t……too表示“无论怎样…也不过分”，“越…越好”。你过马路的时候再小心也不为过。Youcan’tbetoocarefulwhilecrossingtheroad.1.对于你为我们所做的一切，我们怎么感激你都不过分。Wecan’tthankyoutoomuchforwhatyou’vedoneforus.2.过马路时怎么小心都不过分。Youcanneverbetoocarefultocrosstheroad.3.这项工作你做得越出色越好Youcanneverdotheworktoowell.。can/beableto区别:Edisonalwayswonderedwhyhenscouldhatch(孵)chickenswhilehewasnotableto.Question:Arethetwomodalverbsinterchangeable(互换)?Ifnot,why?can表示与生俱来的能力或一种客观可能，而beableto更加强调通过后天的学习和努力获得的能力，或者在某个客观的场合和背景下，能做到的事情。can/beableto区别:1.AbigfirebrokeoutinABChotelyesterday.Luckily,everyone__________runoutofthebuilding.wasableto2.She_____speakbothEnglishandFrench.can写出下面can/could的用法1.IcanspeakEnglishwhilehecan’t.____2.---Canthenewsbetrue?____----Itcan’tbetrue.3.Youcanusemydictionary._____4.Itcouldbeveryinterestingtogooutforadrive._____.2.选词填空:can,beableto1).He____giveyousomeadviceonhowtolearnEnglish.2).Thebabywill___________walkinafewmonths.3).Atlast,they___________escapefromthefire.1.–Whatsortofhousedoyouwanttohave?Somethingbig?--Well,it_________bebig--that’snotimportant。A.mustn’tB.needn’tC.can’tD.won’t2.You______behungryalready—youhadlunchonlytwohoursago!A.wouldn’tB.can’tC.mustn’tD.needn’tCB2.may/might:1.表示许可。表示请求、允许时，might比may的语气更委婉一些。—Might/MayIuseyourcomputer?—Yes,youcan./No,youcan’t/mustn’t.may/might:2.用于祈使句中表示祝愿。3.表示推测、可能（只用于肯定句，疑问句则要用can或could）。祝你成功！Mayyousucceed.Hemaybeverybusynow.Mayyoubehappyallyourlife.1.—MightIwatchTVaftersupper?—Yes,you________.A.mayB.mustC.mightD.can2.Somepeoplewhodon’tliketotalkmucharenotnecessarilyshy；they___justbequietpeople．[2009山东卷]A．mustB．MayC．shouldD．would3.will/would:1.表示请求、建议等，would比will委婉客气。sentencepatternWouldyouplease…Wouldyoumind…Wouldrather…Wouldyoulike…will/would:2.表示意志、愿望和决心。Iwillneverdothatagain.will/would:3.可表示经常性、习惯性、倾向性。翻译为“经常、惯于、总是”。1).Theoldman_______haveasmokeunderabigtreeeveryafternoonafterhefinishedhisfarmwork.would2).门就是打不开!Thedoorwon’topen.will/would:Iwillgototheparkwithyoutomorrowifyouwilloffermelunch.Question:Isthissentencecorrect?Why?情态动词表示“意愿”Will/Wouldyoudo…?(表请求would更委婉)表意志，愿望，决心would表过去反复发生得动作或某种倾向“总是,总要”usedto表过去常常（现在已没有这种习惯）“过去常常”usedto可于状态动词连用would不可以eg.Heusedtobeaquietboy.()Hewouldbeaquietboy.()will/would选词填空：1.He____takeawalkneartheforestintheevening.2.He_____takeawalkneartheforestintheeveningbutnowhegivesup.3.(江苏高考）Dayslater,mybrothercalledtosayhewasallright,but____saywherehewas.A.mustn’tB.shouldn’tC.wouldn’tD.mightn’t4.shall:1.Shall用于第一、第三人称疑问句中，表示说话人征求对方的意见、向对方请示或提供帮助。1.Shallwebeginourlesson?2.Whenshallhebeallowedtoleavehospital?3.ShallIcarrythisbagforyou?shall:2.Shall用于第二、第三人称，表示说话人给对方命令、警告、允诺或威胁。Youshallfailifyoudon‘tworkharder.Heshallbepunishedaccordingtotherule.等我读完这本书，就会给他的。HeshallhavethebookwhenIfinishit.警告威胁允诺5.should1.Should表示劝告、建议、命令，其同义词是oughtto；在疑问句中，通常用should代替ought…to。ShouldIopenthewindow?我们应当要相互学习。Weshouldlearnfromeachother.should:2.情态动词should用于第一人称时可以表示说话人的一种谦逊、客气、委婉的语气。Rose—Sure.Bytheway,whoisyouridol?Jack—LiuXiang,Ishouldsay.Ishouldadviseyounottodothatagain.3.should表示意外或惊讶常译为“居然，竟然”。Ican’tbelievesuchagentlemanshouldbesorudetotheold.我不敢相信这样一个绅士居然对老人如此无礼。should:4.should表示猜测时，一般指按经验或逻辑判断，翻译成“照说应该，估计，想必”should:•---WhencanIcomeforthephotos?Ineedthemtomorrowafternoon.---They_____bereadyby12:00.A.canB.shouldC.mightD.need翻译句子1）Youshallhavethatbooktomorrow2)Shallthosegoodsbesenttoyuatonce?3)孩子应该被告之真相——————————————————6.must和haveto1.Must用于一般问句中,肯定回答用must否定式用needn’t或don’thaveto，做“不必”,mustn’t表示“禁止，不允许”—MustIfinishallassignmentsatatime?—Yes,youmust.No,youneedn't.Youmustn’tgetdownwhilethecarisstillmoving.1.must表示肯定的猜测，译为“一定”，不能用于否定句或疑问句。Thismustbeyourpen.Hemustbedoinghishomeworknow.Hemusthavearrivedalready.Must:表示说话人的态度,常常译为:偏要常用于固定句型：ifyoumustdosth.如果你非得要做某事）如果你真的要走，那就悄悄离开。Ifyoumustleave,doitquietly.—They___bedoingtheexperimentinthelab.—Why？—Becausethelightsarestillburning.A.couldB.canC.mustD.would完成句子1.我们必须今天交作业吗？---______________________________.是的。必须交。____________.走了这么长的路，她一定是累了。__________________________________.Ⅰ.阅读下面句子，按照句子结构的语法性和意义连贯的要求，在空格处填入一个最恰当的情态动词1．Justbepatient，you________expecttheworldtochangesosoon.答案：can’t语法专练2．—Ihaven’tgotthereferencebookyet，butI’llhaveatestonthesubjectnextmonth.—Don’tworry.You________haveitbyFriday.答案：shall3．It________bequitewindyinthenorthofChina，especiallyinspring.答案：can4．Jackdescribedhisfather，who____________abraveboymanyyearsago，asastrongwilledman.答案：musthavebeen5．—MayIsmokehere?—Ifyou________，chooseaseatinthesmokingsection.答案：must6．I’mafraidMr.Harding________seeyounow.He’sbusy.答案：can’t7．You____________bu