have been与had been的区别？（谢瓜了）

Question

这句话中的have been解释下：

Answer 1

had
been
done
过去完成时
过去某个时间之前就已经完成
例如，all
of
my
execises
have
been
done
when
you
asked
me
yesterday.
昨天你问我的时候，我的作业已经做完了。
have
been
done现在完成时
到现在为止已经完成
例如，all
of
my
execises
have
been
done
now.
我现在已经把所有作业做完了。

Answer 2

现在完成时和过去完成时

Answer 3

用于现在完成时和过去完成时