最新情态动词公开课pptPPT课件.ppt

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1、情态动词公开课pptcan/could: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: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’mafraidno

2、tAttention:can/beableto区别:AbigfirebrokeoutinABChotelyesterday.Luckily,everyone__________runoutofthebuilding.wasableto2.She_____speakbothEnglishandFrench.canAttention:advisabilitynecessityoughtto/shouldhavetomustYourmotherbringsyouupandtakesgoodcareofyou,sowhensheisold,you___lookafterh

3、erinreturn.A.canB.mayC.havetoD.mustAttention:veryuncertainalmostcertainmightshouldmustmaycouldoughttowill1.He_____beathome.2.He_____beathome,forhejustcalledmefromhishome15secondsago.A.mayB.mightC.mustA.mayB.mightC.must(can)must表示肯定的猜测，译为“一定”，不能用于否定句或疑问句。Thismustbeyourpen.Hemustbedoing

4、hishomeworknow.Hemusthavearrivedalready.mustmust2.表示“坚持”（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.Attention:—They___bedoingtheexperimentinthelab.—Why？—Becausethelightsarestillburning.A.couldB.canC.mustD.wouldmay/might:1.表示许可。表示请求、允许时，might比may的语气更委婉一些

5、。—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.5.Makingrequests(提出要求):Canyouhelpmewithmytraining?Idon’tknowhowtousethisequipment!willcancouldwouldinfor

6、malformal6.Makingsuggestions(提出建议):Shallwedothetraininginthemorning?It’stoohottotakeexerciseintheafternoon.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

7、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7.Makingoffers(提供帮助):Don’tworry,dear,Iwillwashthemrightaway.Mom,mydirtyclotheshavebeenpiledup!Idon’thavetime……will/would:1.表示请求、建议等，would比will委婉客气。sentencepatt

8、ernWo