may的含义主要有：“可能”，“许可”和“请求”，这在前文中都已讨论过。may还有一种特殊的用法，即用在may...but这样的结构中，表示让步（May can be used to express although clauses.）。请看例句：
1 We may have our differences from time to time, but basically we trust one another's judgment.
We admit that we have our differences, but basically we trust one another's judgment.
或者：Although we have our differences, basically we trust one another's judgment.
而不是改写成：It is possible that we have our differences, but basically we trust one another's judgement.
2 You may have good reasons, but that doesn't make it legal.
=Although you have good reasons, that doesn't make it legal. 尽管你有很好的理由，但这并不意味着就合法。
3 She may be the boss, but that is no excuse for shouting like that.
=Although she is the boss, that is no excuse for shouting like that.
4 You may be older than me, but that doesn't mean you're cleverer.
=Although you are older than me, that doesn't mean you're cleverer.
5 You may be in charge, but it doesn't give you the right to be rude.
=Although you are in charge, it doesn't give you the right to be rude.
6 I may be small, but I am influential. 尽管我身材矮小，但我是很有影响力的。
7 But however amazed our descendants may be at how far from Utopia we were, they will look just like us.
这个句子本来的结构是：Our descendants may be amazed at how far from Utopia we were, they will look just like us. 现在因为有了连词however，所以amazed和however一同提到了句首。这里however引导一个让步状语从句，从句的谓语含有may。
8 When a new movement in art attains a certain fashion, it is advisable to find out what its advocates are aiming at, for, however farfetched and unreasonable their principles may seem today, it is possible that in years to come they may be regarded as normal.
这个句子有一定的难度。关键是要知道这里的for是表示原因的连词，引导原因状语从句，而在这个for引导的原因状语从句里面又套有一个however引导的让步状语从句。这个让步从句原本的结构是：their principles may seem farfetched and unreasonable today，现在因为有了连词however，所以farfetched and unreasonable和however一同提到了句首。
9 Try as he will, no man breaks wholly loose from his first love, no matter who she be... We've only one virginity to lose and where we lost it there our hearts will be!
这里no matter who she be就相当于no matter who she might be这种加强语气的形式，这里的no matter who引导的是一个让步状语从句。此外，该句中的try as he will也是一个让步状语从句的结构。
1．I may be wrong, but that's what I think.
2．These pills may cause dizziness.
3．I'd like to take this chair, if I may.
4．We may be old-fashioned, but we believe in good manners.
5．Might I trouble you for a glass of water?
6．They might decide it isn't worth the effort.
7．Customers may smoke in designated areas only.
8．These exercises, as difficult as they may seem to be, are really good for you.