我问他为什么。他回答时看起来有点困窘。

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

《柯林斯英汉双解大词典》

我问他为什么要这样做。

I asked him why he did this.

youdao

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。

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

youdao

I was taking my younger child home from a play date on Sunday and he asked me out of the blue, ?" "Why can't you marry your mother or your father?"

周日我带我的小儿子去玩，回家的路上,他突然问我，“你为什么不能和你的父母结婚“

耶鲁公开课 - 心理学导论课程节选