是啊，你为什么要这样问？

Yes, what makes you ask?

youdao

奶奶不明白她为什么要这样问，就反过来问小孙女：“你能告诉我哪一辆最好吗？”

Her grandmother could not understand why she had asked such a question and, in turn, she asked her granddaughter, "Can you tell me which of them is the best?"

youdao

爱丽丝尽量地想象这样特殊的生活方式会是什么样子，可是太费脑子了。于是，她又继续问：“她们为什么要住在井底下呢？”

Alice tried to fancy to herself what such an extraordinary ways of living would be like, but it puzzled her too much, so she went on: 'but why did they live at the bottom of a well?'

youdao

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