《情态动词公开》PPT课件

《《情态动词公开》PPT课件》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Unit2GrammarandUsageModalverbscan/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’mafr

2、aidnotcan/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.Attention:can/beableto区别:Edisonalwayswondere

3、dwhyhenscouldhatch(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。Attention:can/beableto区别:AbigfirebrokeoutinABChotelyesterday.Luckily,everyone__________runoutofthebuilding.wasableto2.She_

4、____speakbothEnglishandFrench.canAttention:advisabilitynecessityoughtto/shouldhavetomustYourmotherbringsyouupandtakesgoodcareofyou,sowhensheisold,you___lookafterherinreturn.A.canB.mayC.havetoD.mustAttention:veryuncertainalmostcertainmightshouldmustmaycouldoughttowill1.He_____beathome.2.He_____beatho

5、me,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.Hemustbedoinghishomeworknow.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___bed

6、oingtheexperimentinthelab.—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。—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.Mayyoubehapp

7、yallyourlife.5.Makingrequests(提出要求):Canyouhelpmewithmytraining?Idon’tknowhowtousethisequipment!willcancouldwouldinformalformal6.Makingsuggestions(提出建议):Shallwedothetraininginthemorning?It’stoohottotak