having been done英语语法考验,

来源：学生作业帮编辑：大师作文网作业帮分类：英语作业时间：2024/11/10 08:12:42

having been done英语语法考验,
having been done这是什么语法,它在什么样的情况下正确使用?
请大家用自己的话简明讲解?

1.having been done 是现在分词完成式的被动式.
2.Having been shown around the lab,we were shown around the college.
通过此句可以看出：我们先被领着参观实验室,然后被领着参观学院.
所以：现在分词的完成式的动作发生在谓语之前,那么,现在分词完成式的被动式,就是发生在谓语动词之前的被动动作.

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