Why should he notice her car in particular?

他为什么要特别注意她的轿车呢？

《柯林斯英汉双解大词典》

Why should he have destroyed the chair?

他为什么要把椅子弄坏？

youdao

Why should he whip thee for faults of mine?

他为什么要因为我的过错而打你呢？

youdao

Not one wolf stayed behind. Why should he fight?

VOA: special.2010.02.27

But let me just ask you in the brown shirt, just curious, why do you think ? he is innocent and should be acquitted?

我想请问穿褐色上衣的同学，出于好奇,为何你认为他是无辜且应无罪开释？

耶鲁公开课 - 政治哲学导论课程节选

The law code of Hammurabi is available to us and there's a preface to it in which he basically explains why you should obey the rules that he now is laying down for you.

汉莫拉比法典为我们提供了证据,汉莫拉比在法典的前言中向我们解释了,为什么要遵守他颁布的法律

耶鲁公开课 - 古希腊历史简介课程节选

Why should he not do or say weird things or look strange or disgusting?

NEWYORKER: Tenth of December

After all, why should he be anxious about a competition that he had already won in his mind?

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But he also argues that, since Barack Obama talks of taxing the rich, why should he not join him?

ECONOMIST: An already highly taxed country may be burdened even more