动词虚拟语气的用法、比较等级形式及其示例：
　　I.要点
　　表示说的话不是事实，或者是不可能发生的情况，而是一种愿望、建议或与事实相反的假设等。一般常用于正式的书面语中。
　　1、虚拟语气的构成
　　情景条件从句的谓语动词主句的谓语动词
　　与现在事实相反动词过去式(be要用were)should
　　+动词原形
　　would
　　与过去事实相反had+过去分词should
　　+have+过去分词
　　would
　　与将来事实相反1、动词过去时
　　2、should+动词原形
　　3、were to+动词原形should
　　+动词原形
　　would
　　注：如果条件从句谓语动词包含有were或had,should,could有时可将if省去,但要倒装。如：
　　Had you(If you had)invited us,we would have come to your party.
　　2、虚拟语气在各种从句的应用
　　(1)在主语从句中用来表示惊奇、惋惜、理应如此等，其谓语形式是"should(可省)+动词原形"，常用于以下三种句型中。
　　句型一：It is necessary(important,natural,strange,etc)that…
　　句型二：It is a pity(a shame,no wonder,etc)that…
　　句型三：It is suggested(requested,proposed,desired,etc)that…
　　如：It is strange that he(should)have done that.
　　It is a pity that he(should)be so careless.
　　It is requested that we(should)be so careless.
　　(2)在宾语从句中用于suggest,propose,move,insist,desire,demand,request,order,command等动词后的宾语从句中，表间接的命令和建议。其谓语形式是"(should)+动词原形"。如：
　　I suggest that we(should)go swimming.
　　(3)在表语从句中，表示间接的命令，要求、请求、建议、决定等，主句中的主语通常是suggestion,proposal,request,orders,idea等。从句谓语形式是"(should)+动词原形"。如：
　　His suggestion is that we(should)leave at once.
　　(4)在同位语从句中，谓语形式是"(should)+动词原形"。如：
　　We received order that the work be done at once.
　　(5)在It is time that…句型中，其谓语动词形式是"动词的过去式"或
　　"should+动词原形",should不可省。如：It's time(that)we went(should go)to school.
　　II.例题
　　例1 We had hoped that he ____ longer.
　　A stays B have stayed C stayed D would stay
　　解析：该题正确答案为D。had hoped表示"本希望"，同样用法的动词还有think,expect等，后面的句子需用虚拟语气
　　例2"Mary wants to see you today".
　　"I would rather she ____ tomorrow than today."
　　A comes B came C should come D will come
　　解析：该题正确答案为B。would rather后面的从句需用虚拟语气，用动词过去时表示。www.examw.com
　　例3 Had she been older,she ____ it better.
　　A had done B might have done C might do D would do
　　解析：Had she been older=If she had been old.故该题正确答案为B。