might可以是may的过去式，但它本身也是一个情态动词，表示可能的意思，相对来说委婉一些，比如I might go to a concert tonight.我今晚可能去听一场音乐会。Don't go ─ I might need you.别走——我可能要你帮忙。
might的例句
1、Might I use your phone?
我可以用一下你的电话吗？
2、I thought we might go for a drive on Sunday
我想星期天我们可以开车去兜兜风。
3、Someone might find out, and that would never do.
也许有人会发现，那是绝对不行的。
4、Try his home number ─ he might just be there.
试试他家的号码——他也许在那儿。
may的例句
1、May I borrow it for a day or two?
这个我可以借用一两天吗？
2、Art may be used as a vehicle for propaganda.
艺术可以用作宣传的工具。
3、I have some information you may be able to use.
我有些可能对你有用的信息。
4、The last time I saw him was in May.
我上次见到他是在五月份。