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1·Why couldn't he listen to her?

为什么他不能听她的话？《柯林斯英汉双解大词典》

2·Why have you marked this wrong?

你为什么批这道题为错？《牛津词典》

3·Why don't you ask his advice?

你为什么不征询他的意见？《牛津词典》

4·'Why now?' she wondered hazily.

“为什么是现在？”她困惑地思忖。《牛津词典》

5·Why do people paint pictures?

为什么人们要画画？《柯林斯英汉双解大词典》

6·Why wasn't Weber a nihilist?

为什么韦伯不是个虚无主义者呢？《柯林斯英汉双解大词典》

7·'Why ever not?' she queried.

“为什么不呢？”她问道。《牛津词典》

8·Why are you so chicken, Gregory?

你为什么这么胆小，格雷戈里？《柯林斯英汉双解大词典》

9·'But why?' he interpolated.

“但为什么？”他插嘴问。《牛津词典》

10·Explain why you didn't telephone.

解释一下你为什么不打电话。《柯林斯英汉双解大词典》

为什么

1·'But why...?' Her voice tailed away.

“但是为什么…？”她的声音细了下去。《牛津词典》

2·I'm baffled why she hasn't called.

我不明白她为什么没打电话。《牛津词典》

3·'But why?' he interpolated.

“但为什么？”他插嘴问。《牛津词典》

4·Explain why you didn't telephone.

解释一下你为什么不打电话。《柯林斯英汉双解大词典》

5·Tell me why you did it.

告诉我你为什么这样做。《牛津词典》

原因

1·It's not for me to say why he left.

不适宜由我说出他离开的原因。《牛津词典》

2·That's why I left so early.

这就是我早早离去的原因。《牛津词典》

3·She was quite explicit about why she had left.

她对自己离开的原因直言不讳。《牛津词典》

4·That's why I must trust you to keep this secret.

这就是我一定相信你会保守此秘密的原因。《柯林斯英汉双解大词典》

5·Tom wasted no time in telling me why he had come.

汤姆立即告诉我他来的原因。《柯林斯英汉双解大词典》

为何

1·You look hot—why don't you peel off?

你看来很热—为何不脱掉衣服？《牛津词典》

2·I could never understand why she was fired.

我怎么也不明白她为何被解雇。《牛津词典》

3·He was trying to puzzle out why he had been brought to the house.

他想弄明白自己为何被带到这所房子。《牛津词典》

4·Add to this the excellent service and you can see why it's the most popular hotel on the island.

这再加上优质服务，你就能明白为何这家旅馆在岛上最受欢迎。《牛津词典》

5·But why is anyone shocked?

但是人们为何被震惊？

为什么要

1·They wanted to know why Henderson held the party.

他们想知道亨德森为什么要举办这个聚会。

2·She wanted to make him ask her why she was doing it and of course, he did.

她想让他问她，为什么要这么做，当然，他问了。

3·Nobody knows how they do it with such accuracy, or why eels spawn where they do.

没有人知道它们如何做到那么准确，或是鳗鱼为什么要在大海里产卵。

4·If a double-chocolate raspberry truffle puts you in the mood, why let science get in the way?

如果双重山莓松露巧克力能让您的心情愉悦，为什么要让科学成为障碍？

5·One thing, though, that I think you've overlooked is why Luca Rossi started a furniture company here in Australia in the first place.

不过，我认为你忽略了一点，那就是卢卡·罗西最初为什么要在澳大利亚开家具公司。

怎么

1·Call yourself a friend? So why won't you help me, then?

你说你够朋友？够朋友怎么不肯帮我？《牛津词典》

2·Wretched woman, he thought, why the hell can't she wait?

讨厌的女人，他想，她怎么就不能等等呢？《柯林斯英汉双解大词典》

3·Why won't you listen to reason ?

你怎么就不听劝呢？《牛津词典》

4·Why has the engine stopped?

发动机怎么停了？《牛津词典》

5·Why is everybody riding me today?

怎么今天大家都拿我取笑？《牛津词典》

何必

1·We are all good friends; why stand on ceremony?

都是自己人，何必客气呢？《新英汉大辞典》

2·My dear boy, answered the Dormouse to cheer him up a bit, why worry now?

“我亲爱的孩子，”土拨鼠为了让他高兴一点，回答说，“现在何必担心呢？”

3·I made do with some peanut butter, scooped directly from the jar with a forefinger: why dirty a spoon?

我用花生酱凑合一下，直接用食指从罐子里舀出：何必还要弄脏勺子？

4·Why get upset just because you got one bad grade?

何必因为一次成绩不好就想不开呢？《牛津词典》

5·Why should you be so suspicious?

你何必多疑？《新英汉大辞典》

理由

1·That's why I think we have to revolutionize our concept of movie showing.

这就是我认为我们必须彻底改变电影放映的概念的理由。

2·The principal summoned us into a classroom and informed us about the why and how of our reassignment.

校长召集我们进入教室，通知了我们重新排班的理由和怎样排班。

3·And that, in the end, is why we need open source.

而归根结底，这就是我们需要开源的理由。

4·If someone's been doing your taxes for 20 years, why would you switch?

如果有人帮你处理纳税事务20年，你有什么理由换掉他呢？

5·My first reaction to trying this was, why not?

我尝后的第一个反应就是，我没有理由不喝。

为啥

1·Why doesn't he speak to me any more?

他为啥不再理我了？《牛津词典》

2·So, why did you start learning French?

所以，为啥你还不学习法语呢？

3·If you've got a free account, loved the idea of contact sync but want to see whether it's worth it then why not take advantage?

如果你有一个免费账户，有同步联系人的想法但是想看看是否值得这么做，如果好的话为啥不利用一下呢？

4·Why? Because ethanol is domestic: It replaces oil, and the farm lobby is powerful.

为啥？因为乙醇是国货：它替代原油，而且农场游说团强大得很。

5·Wow thats a well informed senior executive I can see why Japanese business is doing so well.

哇，这可真是位消息灵通的高级主管啊，我知道日企为啥能够做得那么好了。

何以

1·Why all this sudden change?

何以变卦？《新英汉大辞典》

2·Why they fell so far behind may be more of a mystery than why they are currently flourishing.

两国当下为何这么繁荣是个谜，但是两国当初何以那么落后却是一个更大的谜。

3·I believe the first question for new reproductive technologies should not be whether it is right in some timeless, absolute moral sense, but why we might want to do it.

我认为，关于生育新技术的首要问题不应当是它在某种超时空的绝对道德意义上是否“正确”，而在于我们何以可能需要这种技术。

4·So why the hurry?

那么何以这般匆忙呢？

5·This helps explain why China, whatever the glamour of summitry and war games, prefers to do some kinds of business one-to-one.

这也有助于解释，尽管在峰会和军事演习中魅力不凡，中国何以更乐于一对一地达成某些商业生意。

(1)no why不为什么