我不能要她们吃闭门羹，因为这不只是我的房间，我不能把它紧锁。

I can't lock them out because it's not my room to lock.

youdao

我答应要干的事可不能都不干了。

I can't just drop all my commitments.

《牛津词典》

我不必再说了，如果你不能按我说的做，你要承担一切后果。

I needn't add that if you fail to do as I ask, you will suffer the consequences.

《柯林斯英汉双解大词典》

Because,you know,you can't trust me,and so you have to check me out and make sure I'm not lying to you.

因为你不能相信我,你要弄清楚我是否对你们撒谎了。

耶鲁公开课 - 新约课程节选

We can never just have it there before us or, as I say, if we can--if we can--it's a very, very difficult act of concentration.

我们永远不能只面对着它，或者，要我来说，如果我们可以的话，那将需要高度集中注意力，这是很难的。

耶鲁公开课 - 文学理论导论课程节选

I can't go down to the registrar and say, you know, I'd really like to do it at another time.

我不能去和登记的人说，我想要换个时间。

麻省理工公开课 - 固态化学导论课程节选