had+过去分词 had+been过去分词 写成句子分别是那里.最好详细一点.
问题描述：
had+过去分词 had+been过去分词 写成句子分别是那里.最好详细一点.
答
had done 是已经做过某事
had been done是某事已经被做过
he had cleaned the room.他已经打扫过了房间.
the room had been cleaned by him.房间已经被他打扫过了.