Difference bet Could & Might

[sumansen]

Hey all
Could u tell me the difference between Can ,could and may ,might .
Plz give me an example also.I have lots of doubts abt these .

Regards
Suman

[rajan]

Can & Could

Talking about ability

Can you speak Bengali? (present)
She could play the piano when she was five. (past)


Making requests

Can you give me a ring at about 10?
Could you speak up a bit please? (slightly more formal, polite or 'softer')

Asking permission

Can I ask you a question?
Could I ask you a personal question? (more formal, polite or indirect)

Reported speechCould is used as the past of can.

He asked me if I could pick him up after work.

General possibility

You can drive when you're 17. (present)
Women couldn't vote until just after the First World War.

Choice and opportunities

If you want some help with your writing, you can come to classes, or you can get some 1:1 help.
We could go to Stratford tomorrow, but the forecast's not brilliant. (less definite)

Future probability
Could (NOT can) is sometimes used in the same way as might or may, often indicating something less definite.

When I leave university I might travel around a bit, I might do an MA or I suppose I could even get a job.

Present possibility

I think you could be right you know. (NOT can)
That can't be the right answer, it just doesn't make sense.

Past possibility

If I'd known the lecture had been cancelled, I could have stayed in bed longer.

May & Might

May & might sometimes have virtually the same meaning; they are used to talk about possibilities in the past, present or future. ("Could" is also sometimes used).

May is sometimes a little bit "more sure" (50% chance); whereas might expresses more doubt (maybe only a 30% chance).

Hey all
Could u tell me the difference between Can ,could and may ,might .
Plz give me an example also.I have lots of doubts abt these .
Regards
Suman