I don't mean to be rude. I have to run.

不是我没礼貌，我真的要赶时间。

I have to run. 我赶时间。 例：I'd like to talk longer, but I really do have to run.I have to be at a meeting at noon.我想多聊一会，不过我得赶时间，中午还有一个会议。My boss called be back to work.I have to run.我老板叫我回去工作，我得赶时间。