Usage of might, would, could

[Huda2]

hi,
i haven't strong rule to know when i can used might not may,
would not will ,and could not can.

thanks

[Tareq10]

Hi, Huda.

The use of modal verbs is extremely abroad. Try some usefull websites that take up this issue. here is a good website that shows their definition and usage.

http://translate.reference.com
Just write down the word in the space before 'search'