你何不给客人调制鸡尾酒？

Why don't you mix our guests a cocktail?

《牛津词典》

你需要的是换个环境。为何不乘游轮去旅行呢？

What you need is a change of scene. Why not go on a cruise?

《柯林斯英汉双解大词典》

如果你想赞扬某个人或团体的绿色环保行为，何不将他们提名为环境成就奖的候选人？

If you'd like to recognize the greenness of an individual or organization, why not nominate them for an Environmental Achievement Award.

《柯林斯英汉双解大词典》

Why can't you take to the Hustings, persuade your fellow citizens that taxation is unjust and try to get a majority?

你何不去参加竞选，劝说你的同胞,收税不公正的，并争取到大多数人的支持呢？

耶鲁公开课 - 公正课程节选

So why don't you talk about the experience that you had in Israel and also a little bit about what it means to be an Orthodox Jew for those people who don't know maybe the difference between reform and conservative Orthodox.

那何不讲讲你,在以色列的经历,再讲讲,什么是犹太教正统派,向那些可能不知道,改革以及保守正统派的区别的人解释一下。

普林斯顿公开课 - 人性课程节选

And while we're at it, why don't we have overhauling of your interests and desires, your tastes?

既然说到这里，何不彻底必变一下你的兴趣,渴望和品味？

耶鲁公开课 - 死亡课程节选