我不能理解为什么她非要如此粗鲁地对待一位朋友。

I could not understand why she felt compelled to behave so rudely to a friend.

《柯林斯英汉双解大词典》

我真不明白我为什么非要向你解释我的行为不可。

I really don't see why I should have to explain myself to you.

《牛津词典》

你为什么非要老提我离婚的事呢？

Why do you have to keep dragging up my divorce?

《牛津词典》

Dang, Cletus, why'd you have to park by my parents?

克莱特斯，你为什么非要停在我爸妈家门口？

耶鲁公开课 - 公正课程节选