may , might 或许，可能，可以（might可以看作是may的过去式，这两个词除了时态不相同外，在表达意思的许多方面是相近的。当然may 和might又都有一些各自不同的独特用法。）1）可能性I may be y from tomorrow on .从明天起我可能会忙起来。You may catch sight of the sunrise from here when you get up before 5 in the morning .你在早晨五点钟以前起来，或许能从这儿看到日出。I wondered if they might agree with the idea .我想知道他们是否会同意这种想法。She thought it might be wise to try her luck here .她认为在这儿碰碰运气也不错。2）表示允许May I come in ? 我可以进来吗？I'd like to have a smoke here if I may .如果可以的话我想在这儿抽一支烟。The librarian told her that she might return the book to the library in three days .图书馆理员告诉她说，她可以在三天后还那本书。At the press conference , a news reporter asked the chairman if she might trouble him with a question about Taiwan issue.在记者招待会上，一位新闻记者问大会主席她是否能提一个有关台湾问题方面的问题。3) may间或用来表示祝愿，也常用于表示目的或让步的状语从句中:May that day come soon .但愿这天早日到来。May you succeed in winning the first prize in the game .祝愿你比赛夺冠成功。May you continue in your efforts and achieve greatersuccesses .祝愿你继续努力并取得更大的成功。4) might也常用于表示目的等状语从句中，或用于虚拟语气的结构中:I could not convince him , try as I might .我无论用什么样的办法也不能说服他。They left off earlier on that day so that they might catch the first train .那天，他们为了赶上头班车动身早一些。He died so that the others might live .为了其他的人能活下去，他自己牺牲了。If you had made better use of your time , you might have learned more .假若你将自己的时间利用得更好一些，你本可以学到更多东西的。One error in calculation might ruin the whole project .计算中出一点错就可能毁掉整个工程。注意：在回答以may引导的问句时，一般说来避免使用may，以免显得太严厉、或不太客气，而改用其他方式。例如：--May I come in ? --Yes , please .请进。我可以进来吗？ --Sure . / Certainly . .请进。--Please don't . .请不要进来。--No , you mustn't .不行。