Can I turn on the TV?
yes, you can
Can you turn on the laptop?
no, I can't
Can they ride the bike?
yes,they can
Can he turn on the laptop?
no, he can't
Can you play football
no, I can't
Can she turn on the computer?
no, she can't
Can you and your sister play the piano?
no, we can't
Can you turn on the TV?
yes, I can