过去虚拟语气和陈述语气的过去式相同，但动词be 要用were形式表示过去情况的虚拟条件句1. 表示过去情况的虚拟条件句动词形式可以下表表示条件从句中的谓语主句谓语相当于过去完成时的形式had doneWould have +过去分词这类句子表示与事实相反的情况或实现可能性不大的情况If I had known you were coming, I would have met you at the airport.(但是我不知道)If anything had happened, he would have left us know.在主句中，如果主语是第一人称，也有人用should构成谓语。 I should (would) have talked to mother if I had thought of it. I should (would) never have done it, if hadnt been so hard up. 2. 主句也可以用could和might构成谓语If my father had
