Could and might mean different things, but a lot of people use them both to mean the same thing. Here’s a quick guide to avoid any confusion.
Here are two sentences that a lot of people think mean the same thing:
- “I might [or may] go to the cinema tonight.”
- “I could go to the cinema tonight.”
The first sentence means there is a possibility the speaker will go to the cinema that night. The second sentence doesn’t. I know this is a bit picky and pedantic, but ‘could’ – like ‘can’ – comes from the verb ‘to be able to’, so the second sentence either means “I was able to go to the cinema tonight” or “I would be able to go to the cinema tonight.” Neither of those is the same as the first sentence. Adults might get away with confusing ability with possibility, but if you’re taking an English exam any time soon, it’s probably a good idea learn the difference!