having done的用法是非谓语动词用法。非谓语动词又叫非限定动词，非谓语动词是指在句子中不是谓语的动词，主要包括不定式、动名词和分词(现在分词和过去分词)，即动词的非谓语形式。
having done例句Having done these things, he went on again.
做完这些事，他又继续往前走。
Having done quite well in the important exam, he came back home, relaxed and smiling.
他在这场重要的考试中做得很好，他放松地回到家，面带微笑。
It would be rash to try an exam like BEC Higher without having done any preparation at all, even if your English is very good.
即使你的英语很好，如果你没有做任何准备就参加 BEC 高级考试，那也太草率了。
You can congratulate yourself on having done an excellent job.
你应该为你出色的工作感到自豪。
Having done that,she now could rest.
做完了这些事，现在她可以安息了。
He felt ashamed of having done so little.
他为自己干得太少而感到羞愧。
having been done是什么时态是现在完成时。Having been done是现在分词的完成时的被动语态，用的时候常常会出现一个段时间状语。having been done强调动作发生在谓语动词表示的动作之前。Having been done一般强调被动的动作。
