问一下你为什么要离开不知是否唐突？

Would it be impertinent to ask why you're leaving?

《牛津词典》

我可否问一下你为什么要作出那样的决定？

May I ask why you took that decision?

《牛津词典》

你为什么要耽搁大家？

Why were you holding everyone up?

《柯林斯英汉双解大词典》

You didn't know who wrote it, where, when, how, why, and someone says to you, "I want you to draw some conclusions about that piece of writing.

你不知道是谁，在哪里，什么时间，怎么样，为什么要写,然后你被要求对篇文章，做一个总结。

耶鲁公开课 - 旧约导论课程节选

And if you talk to most Americans and you're like, "Oh, why should I put this article there?"

如果你这样问大多数美国人，“为什么要把这个冠词放在这儿？”

韩国人经常犯的失误 - SpeakingMax英语口语达人

Here's Samson: O first created Beam, and thou great Word, ; "Let there be light, and light was over all"; Why am I thus bereav'd thy prime decree?

参孙说到：,为什么我被剥夺你这第一道命令，“我们要有光！“光就普照一切;,为什么我被剥夺你这第一道命令？

耶鲁公开课 - 弥尔顿课程节选