虚拟语气.ppt

虚拟语气.ppt(1)表示与现在事实相反,if从句用过去式,主句用“should/would/could/might+不定式”IfIwereherage,,eed.(2)表示与过去事实相反,if从句用过去完成式,主句用“should/would/could/might+不定式完成式”Ifwehadfoundhimearlier,wemighthavesavedhislife.(3)表示未来实现可能性极小,if从句用should/wereto,主句用“should/would/could/might+不定式”IfIshould/weretodotheexperiment,,had,should时,可以省略if,把were,had,,,(1)ifonly表示“但愿”,“要是……就好”它的用法和Iwish基本相同,’tdrivesofast!(Iwishhedidn’’sadvice.(2)与would连用,.(Iwishitwouldstop.)(3),!.(1)wouldrather意为“宁愿”,reen?I’drather(that)’s(about/high)。It’s(about)’s(high)time(that)(1)表示与现在事实相反或对现在情况有所怀疑,.(2)表示过去想象中的动作或情况,用过去完成式Thisdeviceoperatedasifithadbeenrepaired.(3)如果可能成为事实,.(1)常用“(should)+不定式”表示建议,命令,要求,(should)’.(2)这类动词及其名词常见的有:advise(advice),agree(agreement),decide(decision),demand,determine(determination),indicate(indication),insist(insistence),order,prefer(preference),propose(proposal),request,require(requirement),urge,allow,arrange,ask,beg,ensure,intend,+形容词后的that从句中(1)常用“(should)+不定式”表示建议,惊奇等,(should)haveamap.(2),anxious,appropriate,desirable,eager,essential,impossible,improper,