"I didn't ask you to come. Incidentally, why have you come?"

“我没有叫你来。顺便问一下，你为什么来呢？”

《柯林斯英汉双解大词典》

Ask businesses on both sides of the Atlantic, why have two lots of tests where one would do?

大西洋两岸的企业都在问，当一套测试可以解决问题时，为什么需要两套呢？

youdao

When their stepmother opened it, she exclaimed, "You naughty children, why have you been staying so long in the forest?''

当他们的继母打开它时，她喊道：“你们这些淘气的孩子，为什么在森林里呆这么久？”

youdao

"That's why we need strong rules of the road to guard against the kind of systemic risks we have seen.

VOA: special.2009.09.18

And Moses said to the Lord, "Why have You dealt ill with Your servant , and why have I not enjoyed Your favor, that You have laid the burden of all this people upon me?

摩西对上帝说，您为何苦待你的仆人，为什么我得不到您的恩典呢？,您把所有人的重担都给了我一个人？

耶鲁公开课 - 旧约导论课程节选

Now, why have a story with a sperm as a narrator?

为什么要把精子作为叙述者呢？

耶鲁公开课 - 1945年后的美国小说课程节选

One has to ask the obvious question: why have European banks bought so many government bonds?

FORBES: Fanning The Financial Crisis: Has Regulation Gone Wrong?

Why have relative upstarts like Google, Apple and Amazon.com done so well even in this recession?

FORBES: Magazine Article

So why have stock prices gone up four times as fast as has wages?

FORBES: Stocks Edging Closer To Financial Cliff