had been doing 和 had done的区别

Question

如题所述

Answer 1

had
done
是过去完成时，指发生在早于过去某个时间的行为，该行为到那个时间业已结束。had
been
doing
是过去完成进行时，同样指发生在早于过去某个时间的行为，但这个行为到那个过去时间还在进行。
例如：
By
He
had
done
the
work
by
ten
o'clock
this
morning.
到今天上午十点钟,
他已完成了这项工作。
He
had
been
doing
the
work
by
ten
o'clock
this
morning.
到今天上午十点钟,
他还在干着了这项工作。
He
could
remember
a
time
when
he
had
worked
like
that
himself.
他还能记得自己一度工作起来的那个样子
He
could
remember
a
time
when
he
had
been
working
like
that
himself.
他还能记得自己当时一直在工作的那个样子。