be (get) going 出发，离开(leave)

表示去某个场所，最常用的形态是 be going 或 get going。主要表示不得不去的状况，因此前面会接 should, must, had better 等词汇。

例句：

I guess I'd better be going.

恐怕我要先走了。

It's time we should be going.

我们该起身了。

I must be going. See you in the morning.

我必须先走了。明天早上见。

对话：

A: Well, I think I'd better be going now.

好了，我得先走了。

B: Okay, then I'll see you tomorrow at the office.

好吧，那明天公司见。