Yes, I can swim.
Yes, I can dance.
No, my mumi can't skate.
Yes, I can cook.
No, he can' play the violin.
Mary can't play the piano.
Can Mary play the piano?
Can he speak English?
No,he can't speak English.
Can they ride a bike?
No, they can't ride a bike.
Can he surf?
No, he can't surf.