我不知道为什么。
"I don't know why they left," he said dolefully.
“我不知道他们为什么离开，”他悲伤地说。
I don't know why I settled on Miami, but anyway I did.
我不知道为什么我落户到了迈阿密，但不管怎样我做了。
I don't know why everybody makes such a fuss about a few mosquitoes.
我不知道为什么所有人都为几只蚊子发这么大的牢骚。
"Ladies," boomed Helena, without a microphone, "we all know why we're here tonight."
“女士们”，海伦娜没用话筒朗声说道，“我们都知道今晚我们为什么在这儿。”
You all know why I am here, so I won't waste time on preliminaries.
你们都知道我为什么来这儿，因此我就不浪费时间作介绍了。
You all know why I am here. So I won't waste time on preliminaries.
你们都知道我为什么在这里。所以我就不浪费时间讲客套话了。
I always end up having an argument with her, I don't know why, I just can't help it.
我总是和她意见不合，闹得不欢而散，我不知道为什么，我就是忍不住。
I don't know why the guy yelled at me. And as for going back there, certainly I would never go back, for fear of receiving further abuse.
我不知道为什么这个家伙冲我吼叫。至于回到那儿去，我肯定永远也不会回去了，生怕遭到更多的虐待。
I know you did it—I just want to know why.
我知道这是你干的，我只是想知道为什么。
I don't know why I bother! Nobody ever listens!
我不知道我干吗要浪费时间！根本没人听！
我不知道他为什么哭。
Do you know why we're called wolves?
知道我们为什么叫狼群吗？
I must—though I don't know why.
我必须这样做——尽管我不知道为什么。
Do you know why the erasers are worn?
你知道为什么橡皮会磨损吗？
I don't know why you choose Chinese class?
我不知道为什么你们选择中文课？
I don't know why we haven't done more.
我不知道为什么我们没有做得更多。
Do you know why it's called a whiting?
你知道为什么它叫鳕鱼吗？
I don't know why we're even considering it.
我不知道我们为什么要考虑这个。
Do you know why the stars twinkle so merrily?
你知道为什么星星闪烁得那么快乐吗？
Do you know why she hopped off so soon?
你知道她为什么那么快就走了吗？
Now you know why I never miss a lecture.
现在你知道为什么我从不错过一节课了吧。
Don't you want to know why they are so successful?
你难道不想知道他们为什么这么成功吗？
Now we know why she was prejudiced against the redskins.
现在我们知道她为什么对红皮肤的印第安人有偏见了。
They got caught. Do you know why they got caught?
他们被抓了，你知道为什么会被抓吗？
Already she felt less "contrary", though she did not know why.
虽然她不知道为什么，但她已经觉得不那么“倔”了。
You said it. I just don't know why everyone replies this question.
你说的对，我只是不知道为什么大家都回复这个问题。
Curious to know why she came home again, he began a conversation.
他很想知道她为什么又回家了，便开始和她谈话。
I don't know why he broke off in the middle of a sentence.
我不知道他为什么说到半中腰就停止了。
He himself was feeling quite wakeful and even lively, though he didn't know why.
他自己觉得很清醒，甚至充满活力，虽然他不知道为什么。
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