Can you ski or skate?
Could you ski when you were younger?
* Physical ability
You should eat less chocolate.
* Advice
My doctor says I must cut down on chocolate.
* strong advice, obligation
You ought to respect your parents.
* Moral duty
You can't park your car here!
*Prohibition
She had to wear a uniform when she was a pupil.
* Obligation
Can you ski or skate?
Could you ski when you were younger?
* Physical ability
You should eat less chocolate.
* Advice
My doctor says I must cut down on chocolate.
* strong advice, obligation
You ought to respect your parents.
* Moral duty
You can't park your car here!
*Prohibition
She had to wear a uniform when she was a pupil.
* Obligation