why

复数：whys

1. 为什么 for what reason

1. 唉,噢,唔 (used for expressing surprise or slight impatience or annoyance)

no why不为什么

1. The reasons why he did it are obscure.
   他做那事的理由还不清楚。
2. That is why I am not in favour of the plan.
   那是我不赞成这个计划的理由。
3. He expounded the reasons why he did it.
   他阐述了他做这件事的理由。
4. She knows why the metal is the good conductor.
   她知道金属为什么是好的导体。
5. Why he went there is a mystery to me.
   他为什么到那里去，这对我来说是个谜。

1. Why, it's nearly nine o'clock.
   啊, 快要九点了。
2. Why,it's Bill,as I live and breathe!
   哎呀，原来是比尔啦！
3. Why,he is the one of all others I have wanted to see.
   哎呀，他就是我最想见的人！

1. I cannot explain why.
   我说不出理由。
2. I don't need to hear all the whys and the wherefores, I just want to know what happened.
   我无需听那些大道理,我只想知道是怎么了。
3. Why he went there is a mystery to me.
   他为什么到那里去，这对我来说是个谜。
4. I'm going to tell you why this conundrum exists.
   我打算告诉你们为什么这个谜题存在。