问题描述： having been done 与 have been done 的区别和用法?求大神帮助 1个回答 分类：英语 2014-09-18 问题解答： 我来补答 having been done是过去完成进行时的被动语态,表示过去某一时间正在发生的被动的动作：that shirt having been washed by my mom yesterday.have been done是过去完成时,标一件事已经被完成了：that shirt have been washed by my mom three days ago. 展开全文阅读
