Why ever did you agree?

你究竟为什么要同意？

《牛津词典》

youdao

He cried dismally, "why ever did I do it?"

他沮丧地叫道：“我究竟为什么要这样做？”

youdao

If you didn't really believe that your body was going to die, why would you ever bother writing a will?

如果人们不相信自己的肉体会消亡，为什么要花功夫写遗嘱？

耶鲁公开课 - 死亡课程节选

Why? Any violinists in here or anybody who ever played a string instrument?

这又怎样,这里有小提琴手吗,或者有人拉过弦乐器吗

耶鲁公开课 - 聆听音乐课程节选

So, have you ever liked somebody or disliked them and not known why?

例如，你是否曾经毫无理由地,喜欢或厌恶过某个人？

耶鲁公开课 - 心理学导论课程节选

For instance, many have wondered why ever-more athletic records are broken every year.

ECONOMIST: Poisson: More is more | The

Don't know why I ever thought I needed, don't know why I thought I needed, don't know why I ever thought I needed you.

NPR: Dustbin Bands: The Surreal McCoys

The thorniest question of all is why Enron ever had to resort to these financial shenanigans.

ECONOMIST: The tragedy of one company's rise and fall