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》

I asked him why he did this.

我问他为什么要这样做。

youdao

Since his regular job was boring, I asked him why he just didn't do his sideline full-time.

由于他的正职工作很无聊，我问他为什么不全职做他的副业。

youdao

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 asked him why he had done what he had done, " the Guardian quoted her as saying.

WSJ: Woman Tried to Reason With London Attackers

When my then-second-grade son came home from school one day upset with his teacher I asked him why.

FORBES: Leadership

At one point, I asked him why he no longer lived in Mexico.

NEWYORKER: Show The Monster