Hayley教口語，“有什么用？”用英語怎么說？

(also what's the good of ...)

used to say that one does not think that something is helpful, useful, or worth doing by asking what the purpose of (doing) something is

通過問某人做某事的目的是什么，表達(dá)某人認(rèn)為某事沒有幫助、有用或不值得做

…有什么用

What good is sitting alone in your room?

一個人孤零零地在家坐著又有什么用?

What good does it do to bring an umbrella along if you are only going to leave it in the car?

如果你只是打算把傘放在車?yán)?，帶傘又有什么用?