英语一句话的理解问题 if you'd said that befor i'd have known
问题描述：
英语一句话的理解问题 if you'd said that befor i'd have known
if you'd said that befor i'd have known 两个是不是、都是had
答
不是 ：had 和would
If you had said that before,I would have known.
虚拟语气,由if 引导的非真实条件句.主句谓语用would had done；从句谓语用had done 的结构.表示主从句都是对过去事实的虚拟.