might 与 could区别，谢谢

主要区别如下：
1. 用于疑问句表示请求时，一般只用Could,且可用于各人称。如：
Could you help me explain the difference between "might" and "could"?
Could I use your mobile phone a little while?
上句可用May代替：May I use your mobile phone a little while?
用Might也是可以的，但不常见。
2. could和might都可用在条件句中，表示假想的情况。表示“本来会、本来可以/能够”。例如：
If you tried you could/might do the work better. 如果你试试的话，准能把那项工作干得更好。
You could have met her if you had gone that way. 如果你走那条路的话，你准能遇见她。
此句中的could如改成might则表示：……，你也许能见到他。
They could/might have worked it out if they had asked me for help. 如果他们来向我求助的话，他们本能够做出来的。
He could/might have give the answer, but he refused to. 他本来能够回答的，但他拒绝这么做。
You were stupid to go skiing there — you could have broken your leg. 你真笨，竟会到那地方滑雪。你本来会摔断腿的。
上面的例句中用might则因其语气较轻而语意效果不甚理想。
在此场合，could和might的区别是could较might的可能性强。
3. couldn't be + 比较级句型不能用might代替。如：
Their lifestyles couldn't be more different. 他们的生活方式极为不同。
4. could和might