had done 是什么时态?

had done 是什么时态?
had done 是什么时态?

had done 是什么时态?
过去完成时

过去完成时，表示发生在过去的过去。I had seen him before you introduced him to me.

这个是什么解释 had done是过去完成时。。。表示在过去某个时间已经做完某事或已达到某种状态。整句意思是：他在公交车上时就被扒手偷了钱包。

过去完成时。由had加动词的过去分词。