have been doing是什么时态

have been doing是现在完成进行时，表示从过去一直持续到现在，并且现在并未停止，还将持续到将来。have done现在完成时，到现在为止已经完成。

I have been waiting for you for almost 2 hours.

我一直在等你，快两个小时了。

Where have you been hiding?

你都跑到哪去了？

Who has been making trouble?

是谁一直在捣乱？

We have been looking all over for you.

我们到处在找你。