having been done和having done的区别rt

问题描述:

having been done和having done的区别
rt

having been done 和having done都是非谓语动词的不同形式,都可做动名词与现在分词,都表达完成式,在动名词中都强调动名词动作发生在句子位于动作之前,只是having done表示主动语态的完成having been done 表示被动语...