I have no idea of their having done such a thing.
我不知道他们做过那样的'事。
Having done these things, he went on again.
做完这些事，他又向前飞去。
Having done that, she now could rest.
做完了这些事，现在她可以安息了。
He refused having done it in order to save his face.
为保全面子，他没有承认干过那件事。
You don't go into every job interview having done everything before.
你在面试时，并不是说一定会在此之前做过所有的事。