have been doing 和have done 还有had done三者的区别，用法

Question

举几个例子，谢谢

Answer 1

have been doing 是现在完成进行时，表过去发生的动作一直在进行到现在。
We have reading an interesting book since last week.
have done 是现在完成时，表在过去发生的动作对现有影响。
So far I have been to Beijing twice.
had done 是过去完成时，表过去的过去。
When I got there he had gone.

我是从事英语的，不明再问啦。

Answer 2

注意：这里worn
out
是形容词（adjective）性的短语，不是动词（verb）。所以，在“his
trousers
was
been
worn
out”中，只有“was
been”的短语是动词，符合一个句子一个动词的标准。
be
done
doing是现在完成时的被动形式。强调不久前刚发生事情持续到现在用have
been
doing的现在完成时态，被动即是be
done
doing。
have
been
done是现在完成时态的被动形式。现在完成时态基本结构为have+动词的过去分词。

Answer 3

现在完成进行时/现在完成时/过去完成时
I have been studying.我一直在学习。（从过去一直持续到现在的动作）
I have finished my homewoke.我已经做完了作业。（现在已经完成的动作）
I had closed the window yesterday.我昨天已经关了窗户。（过去已经完成）
明白了吗？？