英语语法虚拟语气.ppt

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1、虚拟语气虚拟语气是英语中的三大语气：陈述、祈使、虚拟之一，用来表达命令、希望、建议、愿望或者用于陈述与现在事实相反。虚拟在虚拟在If 从句中的使用从句中的使用条件从句条件从句主句主句过过去去 If主主语语had donewould/should/could/mighthave done现现在在 If主主语语did/werewould/should/could/mightdo将来将来 If主主语语did/should/were to dowould/should/could/mightdoIf it should rain tomorrow,we would have to put off th

2、e sports meeting.如果明天下雨，我们就得把运动会延期如果明天下雨，我们就得把运动会延期 含蓄条件句I was very busy yesterday,-（要不然我会去参加那个会议）Otherwise I would have come to the meeting错综虚拟语气If I had met her five years ago,she would be my wife today.如果我五年前遇见她，今天她就是我的妻子了。条件句中if 的省略虚拟条件的从句经常省略if，将should，had，were提前到句首，形成倒装虚拟在虚拟在wish从句中的使用从句中的使用现现

3、在在did/were过过去去had done将来将来would/could/might doI wish I had slept longer this morning,but I had to get up and come to class.愿望、建议、命令愿望、建议、命令表示愿望、建议、命令等词引出的从句表示愿望、建议、命令等词引出的从句不管是动词宾语从句不管是动词宾语从句 形容词主语从句形容词主语从句 名词表语从句或者同位语从句名词表语从句或者同位语从句后面都用虚拟后面都用虚拟（should）dodesire,ask,request,demand,require,begsuggest,

4、advise,propose,recommend,move,votedecide,ordermaintain,urgeconsent,insist It is+形容词或者分词thatadvisable,desirable,demanded,ordered,required,suggested essential,necessary,appropriate,important,impossible,natural,strange是时候我们应该调查这个问题了It is(high/about)time thatdid 表示早该做而没有做的事情表示早该做而没有做的事情It is high time that we looked into the problem.In case,lest,for fear that+should do