Is she good at waterskiing?
Yes, she is.
Do you play tennis?
Yes, I do.
What is this sport?
Ski
Is he surfing?
No, he isn't
What is this sport?
Do judo
Is he good at surfing?
No, he isn't.
Do you do gymnastics?
No, I don't
What is he doing?
He is playing golf
What is this sport?
Waterskiing
What is this sport?
Play tennis
What is this sport?
Rafting
Is she swimming?
Yes, she is
Do you cycle?
Yes I do
What is he doing?
He's playing basketball/ He plays basketball
Do you swim?
No, I don't.
Do you do judo?
Yes, I do.
What is she good at?
She is good at swimming
What is she doing?
She is playing tennis