何妨的英文：
might as well; why not

参考例句：

Though our shop covers within a limited area, multiple service facilities are available here. Why not have a try?
本店铺面虽小，多种服务设施齐全，何妨一试。

But why don't you ask Kao Sung-nien about it directly?Maybe he inadvertently left yours out
不过你何妨直接问一问高松年，也许他无心漏掉你一张。

might是什么意思：
modal v. 可能；会，能；请；应该
n. 力气；力量；威力；权力

If you were older you might understand.
假如你年龄再大一点，你就会理解了。

How old might she be?
她的年龄会有多大呢?

Misfortune might be a Blessing in disguise
塞翁失马焉知非福

Might is (or makes or overcomes) right
强权就是公理

You might do me a favor?
请你帮我—个忙好吗？

why是什么意思：
adv. （用作疑问副词）为什么，（用做关系副词）为什么
n. 原因，理由
int. 咦，哎呀，哦，当然，唔

Why are you in such a hurry?
你为什么这样急呢?

Is this why the Yen is so strong?
这是日元如此强劲的原因吗？

Why, I was fast asleep.
怎么，我睡得很熟的呀。

Why is Leo behind time?
利奥为什么迟到了？

Why not fire away at the engineer?
为什么不向工程师提出问题?