CAN'T - ABILITY
CAN - POSSIBILITY
CAN - PERMISSION
CAN'T - PERMISSION
CAN'T - IMPOSSIBLE
MUST - OBLIGATION
SHOULD - ADVICE
CAN - ABILITY
MUSTN'T - PROHIBITION
SHOULDN'T - ADVICE
Students should pay attention in class.
Penguins can't fly.
Can I phone home? I don't feel OK.
You can't know Sue's husband. She is single.
If your arm is broken, you must go to the hospital.
You can't eat in class.
Rafa Nadal can play tennis
You shouldn't go for a swim after a big meal.
I can phone Sarah, I know her phone number.
People mustn't smoke in public places.