have to/ dont have to/ can/ cant

'Can' indicates the ability to do something or permission to do something.

'Can't' signifies the inability to do something or prohibition against doing something.

'Have to' indicates a necessity or obligation to do something.

'Don't have to' implies that there is no obligation to do something.

You can swim in the ocean if you know how to swim.

You can't enter the building without a pass.

You have to wear a helmet when riding a bike.

You don't have to attend the meeting if you have other commitments.

'Can' expresses ability or permission, while 'can't' expresses inability or prohibition.

'Have to' indicates a requirement, while 'don't have to' indicates a lack of requirement.