He says something, and he doesn't really know where those words come from. He doesn't really know what made his granny so angry about those words.

他不知道自己说了什么,更不知道为什么,这会让祖母抓狂。

耶鲁公开课 - 1945年后的美国小说课程节选

But I, I don't know. I just like looking at his stuff.

我也不知道为什么。我只是喜欢看他设计的东西。

梦想成为时装设计师 - SpeakingMax英语口语达人

Why did God place the stupid fruit in the garden in the first place if he knew in advance that Adam and Eve were going to eat the thing?

如果他事先就知道偷食禁果的事情会发生,为什么还要把这个不祥的果实就那么放在园子里？

耶鲁公开课 - 弥尔顿课程节选

One wants to know why, why does he want to do that?

人们想知道为什么他想这么做？

耶鲁公开课 - 政治哲学导论课程节选

He wants to know how things work and why things are happening.

他想知道事物是如何运作的,以及为什么事情会发生

耶鲁公开课 - 金融市场课程节选