He asked him why he was doing that.

他父亲问他为什么要那样做。

youdao

He asked him why he wanted so much money whereas he had no experience.

他问，既然刚工作没有经验，为什么还要这么多的钱。

youdao

I asked him why. He looked a little sheepish when he answered.

我问他为什么。他回答时看起来有点困窘。

《柯林斯英汉双解大词典》

The soldiers there once asked him why he went out into Apache country every day.

VOA: special.2010.02.15

So my student called Bernard Sadow up and asked him about his invention and he said, "Yeah, I was thinking, why don't we have wheels on suitcases?

于是我的学生打电话给伯纳德？沙度,然后询问了他关于发明的事情，他说道，是啊，我当时在想，我们为什么不能在行李箱上安轮子呢？

耶鲁公开课 - 金融市场课程节选

"I never endorse what I don't actually use, " he said later, when I asked him why he'd been so successful in business.

WSJ: Arnold Palmer's Lessons for His Grandson, Sam Saunders | Golf Journal by John Paul Newport

When he started studying MTOR 15 years ago, it was so obscure that colleagues asked him why he bothered to work on it.

FORBES: Health

He said after being rescued from the river Mr Oldfield was detained by police who asked him why he had jumped in the water.

BBC: Trenton Oldfield 'caused chaos' at University Boat Race