Yeah, I'm actually really worried about him.实际上我真的很担心他

worry about担心； 烦恼

It doesn't signify, so you needn't worry about it.

这无所谓，你不必担心。

I wouldn't worry about it, if I were you.

如果我是你，我就不会担心。

He said, "it's hard to focus on the game他说 ，很难将注意力集中在比赛上

focus on集中在

Our policy is to focus on developing these areas.

我们的政策是着眼于把这些地区发展起来。

The noise made it hard for me to focus on work.

噪音让我无法集中注意力工作。

when your own teammates are playing against you."当你的队友们都在对付你"

play against与 ... 比赛

Who did you play against last week?

上星期你们同谁比赛的?

Which team did they play against this time.

这次他们的对手是谁。