会【huì】

会 is the "can" of a skill you learned. Driving, swimming, cooking, speaking a language – anything that had to be picked up.

It is about the skill, not the moment

会游泳 means you know how to swim. Whether you can swim right now, with a broken arm or no pool nearby, is a question for 能.

Negation

不会, never 没会.

不会 also means "I don't know how", which is the ordinary way to say you cannot do something you were never taught.

Degree

Because 会 is about a skill, it takes 很 and 一点儿 the way an adjective does.

会 for what will happen

A second use, unrelated to skill: 会 predicts.