大学英语 情态动词2.ppt

《大学英语 情态动词2.ppt》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、情态动词/ModalAuxiliary什么是情态动词？情态动词和助动词一样，都是辅助性的动词，用来帮助构成不同的时态和语态，表示说话者的某种情态，没有人称和数的变化maymightcancouldshallshouldwillwouldMust无变化Will和Would1.表示请求Willyougivehertheletter?Wouldyoupleasetellmeyourtelephonenumber?2.表示习惯或倾向，与usedto进行对比ScarfusedtobeheavysmokerFatherusednottobesoforgetfu

2、l2.Would强调过去某种特定情况下的动作，是完全过去的事情，与现在没有联系。SheusedtogetupatsixinthemorningShewouldgetupatsixinthemorningManusedtothinkthattheearthwasflatManwouldthinkthattheearthwasflatInthosedays,wheneverIhaddifficulties,I____Mr.Shenforhelp.A.UsedtogotoB.WasusedtogotoC.WouldgotoD.UsedtogoingtoH

3、e_____upatfive,butnowhegetsupatsix.A.UsedtogettingB.WouldgetC.WasusedtogetD.Usedtoget3.表示推测ItwillbeMr.Wangknockingatthedoor.Itwouldbeaboutteno’clockwhenhelefthomeThey____inNewYorkbynow.A.willarriveB.willbearrivingC.willhavearrivedD.arearriving4.表示命令、强迫Allwillarrivebefore7:455.

4、表示意愿或者固执地坚持。Shewon’tlendmethemoneyThewindowwon’topen6.表示能力（拟人化）Thehallwillseat1000people7.表示客观事实Fishwilldieoutofwater8.表示意图或允诺Youwiihaveyourshare9WouldratherWouldrather(sooner)….thanHewouldrather___than____thesecret.A.die…..tellingB.die…..totellC.dead….tellD.die…..tellIwouldra

5、theryou_____herthebiketheotherday.A.didn’tlendB.hadn’tlentC.shouldnotlendD.wouldn’thavelentCan/could1）表示许可Youcanborrowtwobooksatatimefromthelibrary2）表示可能性Ican’tguesswhosebookitis3）表示能力Shecouldn’tclimbthemountain注意：Can’thelp和couldn’tbear中的不能变成beableto.Theweatherwasabletoclearup

6、ThefirewasnotabletobeputoutCan(could)+have+过去分词有时等于may(might)+have+过去分词意思为可能CantheyhavemissedthetrainHecouldn’thavebeenswimmingalldayShecouldn’thaveheardyouknockingatthedoor第二单元Haveto和must1)haveto强调客观需要，must强调主观看法ImustlearnanotherlanguageIhavetolearnanotherlanguageSomeonemusth

7、avelostthegame.Someonehadtolosethegame注意以下两句Thoughshedidn’tneedto,shemustgo.Youdon’thavetocomeagain,butyoumust2.haveto表示义务或习惯动作，must表示重要或急迫的事情。WehavetocarefortheyoungShehastobeattheofficebeforeeighteveryday.Youmustgotothemanageratonce,oryou’llbedismissed.3)haveto可用于不同时态，must一般

8、只用于现在时IhavetoleavenowWe’llhavetobuyanotherTVsetTheyhadtoputof