having been done和done的区别

来源：学生作业帮编辑：作业帮分类：综合作业时间：2024/05/18 00:22:06

having been done和done的区别
having been done和done都指过去发生,且有被动含义,在用法上到底有没有什么区别?

前一个having been done 是有比较的,即在过去的某件事情（已经是过去了）之前发生,done只是被动过去发生的事情,无比较对象

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