请问老师，wouldn't have done 都有哪些用法？

它和would have done 用法是否完全相同？

【答】从网友的提问看出，似乎是：否定的wouldn't have done，能否表示对过去情况的推测？

答案应该是肯定的。例如：

Any thinking person would not have accepted such a condition.  任何一个有思想的人（在当时）是都不会接受这个条件的。

A wiser man would not have done such a foolish thing.  聪明一点的人是不会干出这等蠢事的。

【说明】上句话有两层意思：

1. 对过去情况的推测。

2. 隐含的虚拟语气。等于：If he had been a wiser man, he would not have done such a foolish thing.