For crying out loud! Why did you have to do that?

真是岂有此理！你为什么非得干那种事？

《牛津词典》

Why do you think we should have a vote on that?

你为什么认为我们应该对那件事进行投票表决？

《柯林斯英汉双解大词典》

"Why do you want to know that?" he demanded.—"Just curious, that's all."

“你为什么想了解它？”他索问道。—“只是好奇，仅此而已。”

《柯林斯英汉双解大词典》

And he said to us, "Why do you sit there like that?

VOA: special.2010.05.02

On Thursday, we'll look at why that allows you to do lots of things more conveniently than you can do without mutation.

周四我们会探讨下,为什么这种可变性会让你,在进行很多操作的时候方便了许多。

麻省理工公开课 - 计算机科学及编程导论课程节选

People are like, "Oh, why would you want to do that?"

人们就像说“噢，你为什么想那么做？”

我要当女军人 - SpeakingMax英语口语达人

Why would you do that to a blameless black pudding?

BBC: Postcard from Edinburgh

If you believe that you put that out, why do you believe you're not -- that you're not talking about that anymore right now?

WHITEHOUSE: Press Briefing

Q25: Why do you think that there are more websites for what individuals can do about climate change than what companies and governments can do?

UNESCO: Climate change