could跟might用法上有什么区别?

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could跟might用法上有什么区别?

could跟might用法上有什么区别?
could跟might用法上有什么区别?

could跟might用法上有什么区别?
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:
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都可用在表示“结果”的状语从句中,同样,could语气较重些.例如:
He expressed his ideas clearly so that the average person might understand. 他把他的意思清楚地表达出来,以便一般人能听明白.
5. might as well表示“不妨、可以、倒不如”,此时的might是不能用could代替的.例如:
We might as well look for some food now. 现在我们不妨找些吃的东西.
I expect I might as well be going. 我希望我可以走了.