1. You see I'm in the middle of something.
你看，我正忙着呢。

2. I can't make it at that time.
我脱不开身啊。

3. I am tied up.
我有事走不开。

4. I'm sorry, I'm otherwise engaged.
对不起，我有其他安排了。

5. I have other fish to fry.
我还有别的事要做。

6. I am in a meeting. I'll call you later.
在开会呢，过会儿打给你。

7. Sorry, I have plans.
对不起，我有事。