If +主语+had had down ,主语+would have down...这个虚拟语气的用法是在什么情况下使用

If +主语+had had down ,主语+would have down...这个虚拟语气的用法是在什么情况下使用 wish的虚拟语气在表示对过去情况的虚拟 wish + 主语 + would（could）+ have + 过去分词表示 虚拟语气中 省略if的用法 if he had known the truth,he would have told t If引导的虚拟语气句子 一般 将来 过去 还有主语加would have done/been would have done 和would had done 分别用在什么句子中?请举例句说明（虚拟语气的用法） could have down除了虚拟语气还有什么用法 虚拟语气If she had worked harder,she would have succeeded这是过去完成时 if a had a chance ,i would have worked hard这句 话是过去时的虚拟语气吗 虚拟语气中had done与would have done,did与would do 的用法有何区别 什么情况下用主语+had+过去分词(done)什么时候用 /主语+had been+过 请教suggest的虚拟语气的用法,什么情况下是虚拟语气 would have done非虚拟语气情况下的用法和意义