我不能工作了，为什么他们害怕他们。

I could not work out why they feared them.

youdao

你的言外之意是不是我不能胜任这份工作？

Are you inferring (that) I'm not capable of doing the job?

《牛津词典》

我不能承担任何额外工作。

I can't take on any extra work.

《牛津词典》

So I think that by doing that, I can't force you to hang outside of work, but I can make it so that people are more with each other and can communicate more freely.

工作之余，我不能强迫大家也在一起，但能够让他们在与同事相处的时候,感觉更舒服，交流更自由。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

I guess you can't really work because there's too much unemployment

我觉得你不能先工作，因为失业太多了，

英国的高考 - SpeakingMax英语口语达人