在英语中，"姐夫"一词可以用"brother-in-law"来表示。这个词是由两个词组合而成的，即"brother"和"in-law"。"Brother"在英语中表示"兄弟"，"in-law"则是指"婚姻家庭成员"。因此，"brother-in-law"就表示"姐夫"的意思。

例句：

My brother-in-law is a doctor.

(我的姐夫是一名医生。)

She is very close to her brother-in-law.

(她和她的姐夫非常亲近。)

We are having dinner with my brother-in-law and his family tonight.

(今晚我们将和我的姐夫及其家人一起共进晚餐。)