#english_language 

## Both
- We use can't/couldn't to say that it is not possible for something to be true:
	> There can't/couldn't be any milk left - I would have seen it in the fridge

## Can
- We use can in affirmative sentences when we talk about a more general possibility of something, just like [[May and might#^9e23ca|may in formal contexts]]

## Could
- We can also use could with a similar meaning to ![[May and might#^0a2ddc]], although we are less sure about the possibility:
	> There may/might/could be some cake left. I'll go and look