I was only worried about it when I saw her with Shana.我唯一担心的就是看到她和莎娜一起的时候

worry about:担心； 烦恼

I don't think you need to worry about this.

我认为你不必为这事担心。

You should have seen those chicks fighting over me at the bar.你真应该看看那几个在酒吧为我打架的女人

fight over:争夺； 为 ... 争吵

The twin sisters always fight over toys.

这对双胞胎姐妹经常因为玩具而争吵。

The two boys fought over a game and then made friends again.

两个男孩因一场比赛而斗殴，后又重归于好。

It's the only thing I can think of that might explain how upset she's been.她最近如此沮丧这是我能想到的唯一解释了

think of:想到

He would never think of letting his daughter marry a fellow like you.

他决不会想到让女儿嫁给像你这样的家伙。

相关短语:

think much of重视

I don't think much of his ideas.

我认为他的一些看法并不怎么样。

think nothing of 不把 ... 放在心里

She thinks nothing of walking ten miles.

她把步行十英里不当一回事。