if something might happen or might be true, there is a possibility that it may happen or may be true, but you are not at all certain

也许，可能，大概:

I might be a few minutes late.

我可能会晚到几分钟。

She might not want to come with us.

她可能不想和我们一起去。

He might have missed the train.

他可能错过了火车。

This might well be her last public performance (=it is fairly likely) .

这很可能是她最后一次公开演出了。

One of the guards might easily panic and shoot someone (=it is likely) .

可能会有卫兵惊慌起来开枪打人。

used as the past tense of 'may' when reporting that someone talked or thought about the possibility of something

可能，可以〔may 的过去式〕:

He might be able to help you.

他当时也许能帮你。

I thought they might have gone home.

我想他们可能已经回家了。

She was worried that we might get hurt.

她担心我们可能会受到伤害。

used to say that something was a possibility in the past but did not actually happen

〔表示过去可能会发生但实际没有发生〕:

It was terrifying. We might have been killed.

好可怕，我们差点没命了。

[spoken especially BrE] used to politely ask for permission to do something

可以〔用于礼貌地请求允许做某事〕:

Might I borrow your pen?

我能借用你的钢笔吗？

I wonder if I might speak to your son.

我想知道我是否可以和你的儿子谈谈。

used when reporting that someone asked for permission to do something

可以〔用于转述某人的请求〕:

He asked if he might come in and look around.

他问他是否可以进来看看。

used to suggest that someone should do something, because there is no good reason to do anything else

最好还是…，还是…为好，倒不如…:

I suppose we might as well go home.

我想我们还是回家为好。

used to say that the effect of an action or situation is the same as if it was another one

还不如，倒不如〔用于表示某个行为或情况似与另一个效果相同〕:

They might as well have a badge on them saying 'Steal me'.

他们倒不如别枚徽章，写上“把我偷去吧”。

He might as well have been a million miles away.

他倒不如在千里之外。