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。
例句
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。
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