May I ask why you took that decision?

我可否问一下你为什么要作出那样的决定？

《牛津词典》

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

问一下你为什么要离开不知是否唐突？

《牛津词典》

Dare I ask why?

我敢问为什么吗？

youdao

Many of his songs seemed to ask: "Why can't we make this marriage work?"

VOA: special.2009.11.22

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

We actually--We need to step back and ask questions like and these are questions we're going to ask Why does poop smell bad?

事实上，我们需要追溯,问一些问题,诸如我们打算问,为什么大便闻起来不好？

耶鲁公开课 - 心理学导论课程节选

Several people have emailed to ask why the taskforce is not mandated to retake captured ships.

BBC: Somali pirate patrol: Day five

Some might ask why I focus this blog so much on the aggregate data.

FORBES: Data Insight: Venture Capital returns and loss rates

Please step back and ask why these developers would need a PPA to finance capital costs.

FORBES: Energy Deals Derailed by Obscure Accounting Rule