has been done 与had been done要怎么用

Question

如题所述

Answer 1

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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Answer 2

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/完成了本回答被提问者采纳