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《lecture 7：虚拟语气+非谓语动词(week 8).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、PPTbyMartha英语基础知识培训班语法语法词汇培训班Contents一、虚拟语气二、非谓语动词第一讲虚拟语气一、基本结构1.三个时态1）对过去假设If…haddone…,…would(could,should)havedone…Eg:Ifyouhadn’tbeenlateforthemeeting,youcouldhavemetMr.Johnson.2）对现在假设If…did/were…,…would(could,might)do/be…Eg:IfIwereyou,Iwouldbemorecareful.Ifhedisappeared,Iwo
2、uldtakehisplace.3）对将来假设If…should/weretodo…,…would(should,could,might)do….Eg:Ifsheshouldmeetanydifficulty,herteacherwouldhelpherout.Ifthemeetingweretobecanceled,thesecretarywouldinformyou.2.错综时间Eg:IfIhadtakenmyteacher’sadvicewhenIwasinmiddleschool,Iwouldbeascientistnow.(从句对过去假设
3、，主句对现在假设)__________ifIhadarrivedyesterdaywithoutlettingyouknowbeforehand?A.wouldyoubesurprisedB.WereyousurprisedC.HadyoubeensurprisedD.Wouldyouhavebeensurprised答案：A(问当下的感受)3.基本结构倒装――通常为省掉if,从句倒装HadIcomeearlieryesterday,Iwouldhavemetmygoodfriend.(过去)WereItodiehere,Iwouldbedried
4、outbythewindinaday.（将来）Haditnotbeenforhishelp,wewouldnothavesucceeded.（过去）Wereitnotforgravity,wewouldfloatintheair.（现在）Shouldthejobbetoodifficult,youcouldaskmeforhelp.（将来）（注意肯定句和否定句倒装时的顺序）4.基本结构变体1）委婉说法（一半真实，一半虚拟）Eg:Hewouldhavecalledyou,buthehasbeensobusy.还原：Ifhehadn’tbeensobu
5、sy,hewouldhavecalledyou.2)变体的短语，词汇butfor,butthat(从句),without,ifithadn’tbeenfor,otherwise等eg:Withouthishelp,Iwouldn’tbesosuccessful.Butfortherain,wewouldhavehadaniceholiday.Therainwasheavy,otherwise,wewouldhavehadaniceday.onconditionthat,providedthat,supposing等eg:Providedthatyo
6、uhadtheopportunitytogoabroad,wherewouldyougo?二、Should+动词原形凡是表达命令，建议，惊奇，不满，必须，请求，希望，意愿等意义的词（动词，名词，形容词）构成的从句,都用should+动词原形（should可以省略）Eg:Thegovernmenthasdecidedthatthepresentpolicy(should)bemaintained.(宾语从句)Thedecisionbythegovernmentisthatthepresentpolicy(should)bemaintained.(表语
7、从句)Thedecisionthatthepresentpolicybemaintainedhasalreadybeencarriedout.(同位语从句)Itisdecidedthatthepresentpolicybemaintained.(主语从句)1.主语从句中常见的形容词、过去分词。Itis/was+adj./-ed.+thatadvisable,appropriate,desirable,essential,important,impossible,imperative,natural,necessary,preferable,prob
8、able,possible,strange,suggested,urgent,vital,desired,ordered,
