What can they do?
They can ride bikes.
Can you ski?
Yes, I do. / No, I don't.
What can you do?
I can dance.
What can she do?
She can ski.
He/ cook?
Can she cook?
What can she do?
She can ride a horse.
He/ not/ play tennis.
He can't play tennis.
What can they do?
They can catch fish.
What can he do?
He can swim.
Can you play football?
Yes, I can. / No, I don't.
What can he do?
He can cook.
What can he do?
He can climb.
Can pigs fly?
No, they can't.