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》

我想我本来应该问的是，“你为什么要把海星扔进海里呢？”

I guess I should have asked, "Why are you throwing starfish in the ocean?"

youdao

Lane looked faintly interrupted. "Why what?" " Why did you think it was going to go over like a lead balloon?"

莱恩微弱的问，什么为什么“,为什么你认为它像一个领头气球“

耶鲁公开课 - 1945年后的美国小说课程节选

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

Why 5,040, you may ask;do we have any mathematicians among us who will give me a quick answer to that?

你会问为什么是五千零四十个呢,在座的有没有数学家能快速给出答案

耶鲁公开课 - 古希腊历史简介课程节选