Question

to have been done和having been done有什么区别吗？怎么用？

to have been done和having been done有什么区别吗？怎么用？最好能举例说明，谢谢

Answer 1

两者共同点的都是被动语态，不同的是：
to have been done 不定式形式
having been done 现在分词的完成被动式
不同点：
不定式作目的状语。
而分词作状语，远比不定式使用范围广：常表示伴随情况；表示原因；表示时间和表示结果。例如：
1. I am glad to have been invited to this party.
不定式：to have...party 作原因状语
2. Having been criticized today, he was so sad. 今天被批评了，他很难过。
having been criticized 作原因状语

追答

谢谢网友釆纳

楼主呢

Answer 2

to have been done是已经完成了，例如:The homeworks have been done last night.昨晚把大堆功课搞定了;
和
having been done是就快完成，例如:The homeworks having been done soon.大堆功了就快完成了!
区别很大，很好用;

Answer 3

The book is said to have been translated into several languages.本句中因句型结构要用不定式，且teanslate动作发生在主句前所以用完成时。
Having been taught many times, the boy still can not solve the math problem.