has been done 与had been done要怎么用啊

来源：学生作业帮编辑：搜搜考试网作业帮分类：英语作业时间：2024/05/28 18:49:29

has been done 与had been done要怎么用啊?
has been done 是现在完成时的被动语态.
had been done是过去完成时的被动语态.过去完成时的概念是【相对过去的某个时间更早的】【过去】
如：
The work has been done.这项工作做完了/完成了.
The work had been done before you came.这项工作【在你来之前】做完了/完成了.
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has been done 与had been done要怎么用啊 had been done 怎么用? have done.have been done .had done.had been done 有什么区别?怎么用?有 has been done,had been done 的区别是什么? what had been done had been done. had been done & having been done 区别 has/had been gone和has had been done的区别是什么啊我要疯了.做题总错 had done 和 had been done有什么区别啊? had been done had done区别 Have/Has been done 与Have/Has done 到底有什么区别啊 all that can be done has been done 为什么要用has,不用have has + done和had been V+ing区别