What is the difference between "I can go swimming" and "I can swim"? Are they the same?
I can swim.
Implies that you're able to swim based on your own abilities, meaning that you're not inhibited from swimming because of something about yourself.
I can go swimming.
Implies that you are able to swim because of other factors not about yourself. This could be that there is a place available to swim in (a lake for example) or that you've been given permission to go swimming (perhaps by a parent).
It's easier to think about from the negative:
- I can't swim. <- You don't actually know how to swim.
- I can't go swimming. <- Your parent hasn't given you permission to go swimming.