“你们为什么窃窃私语？”他生气地问。

"Why are you whispering?" he asked irritably.

《柯林斯英汉双解大词典》

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》

Franny again cleared her throat. Apparently, her self-imposed sentence of unadulterated good listenership had been fully served. "Why?" she asked.

弗兰尼又清了喉咙，他的自欺式的自白得到了倾听,遇到了好听众，为什么，她问。

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

We're not being merely churlish, I think, if we want to ask why someone would want to write a poem in such a form.

我们要问为什么会有人,想要写这种形式的诗并非毫无道理。

耶鲁公开课 - 弥尔顿课程节选