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If 从句中的使用,If it should rain tomorrow, we would have to put off the sports meeting. 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 w
2、ould 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wish从句中的使用,I wish I had slept longer this morning, but I had to get up and come to class.,愿望、建议、命令,表示愿望、建议、命令等词引出的从句 不管是动词宾语从句形容词主语从句名词表语从句或者同位语从句 后面都用虚拟 （should）do,desire, ask, request, demand, req
3、uire, beg suggest, advise, propose, recommend, move, vote decide, order maintain, urge consent, insist,It is+形容词或者分词that advisable, desirable, demanded, ordered, required, suggestedessential, 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,It is high time that we looked into the problem.,In case,lest, for fear that + should do,
