Is she surfing?
Yes, she is surfing
Is he windsurfing?
No, he isn't windsurfing, he is snorkeling
Are we swimming?
No, we aren't swimming. We are diving.
Are you kayaking?
Yes, I'm kayaking
Is he snorkeling?
No, he isn't snorkeling. He is swimming
Is she waterskiing?
Yes, she is waterskiing.
Is he diving?
No, he isn't diving. He is windsurfing
Are they sailing?
Yes, they are sailing