You know what's gonna happen when I catch up with you?你們最好小心點別讓我抓到

catch up with:趕上

She walked too slowly to catch up with us.

她走得太慢，跟不上我們。

I have to work hard to catch up with the other students.

要想趕上其他同學，我得特別努力才行。

常用短語:

catch up on補上

I have to catch up on my work so I can't come out.

我要把工作補上，不能出去了。

catch up in陷入

We were caught up in the excitement of the crowd .

我們受到群情激奮的感染。

It's only a couple of carrots 不過是幾根胡蘿卜嘛

a couple of:幾個

I'll be back in a couple of days.

我過幾天就回來。

He patched up a couple of old tires.

他補了幾條舊車胎。

What are you talking about?你在說什么啊?

talk about:談論，談及；談到

He went on to talk about the world situation.

他接著又談了談世界形勢。