having been done 与 have been done 的区别和用法?求大神帮助

问题描述:

having been done 与 have been done 的区别和用法?求大神帮助

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...