情态动词用法
8.2 may 和 might 用于表示"事实上的可能性"或"预测"：
1. It may rain tomorrow. (表示可能会发生)
明天可能会下雨。
2. It may snow later this afternoon. (表示预测)
今天下午可能会下雪。
3. You might be right. (表示有可能)
你可能是对的。
4. It is possible he may have called while we were out. (现在完成式型may have called)
当我们出门后，他有可能会打电话来。
5. Sam might have taken the money, but it seems unlikely. (过去完成式型might have taken)
钱可能会是Sam拿走的，但又不太像。
6. If you took some exercise, you might not be so fat. (might 用于条件句) 要是你锻炼锻炼，可能不会这样胖。
7. Electric irons could be dangerous; they might give you a severe shock. (这里的might表示可能性比may 小一些)
电熨斗会有危险的，它可能使你受到严重的电击。
8.3 will 和 would 用于表示"预测"或"习惯性"：
1. I think he will be all right now. (will be 表示一定会)
我想他现在一定好了。
2. That would be his mother. (would be 表示肯定是)