Is he good at skiing?
No, he's not very good at it.
What's this?
ice-skate
What's this?
snowboard
What's this?
in-line skate
Is he good at snowboarding?
Yes, he's very good at it.
Is he good at skateboarding?
No, he's not very good at it.
He's good _______ skiing.
at
Is she good at ice-skating?
No, she's not very good at it.
What's this?
ski
Is he good at surfing?
Yes, he's very good at it.
Is he good at in-line skating?
Yes, he's very good at it.
What's this?
surf
What's this?
skate board
He ______ good at _________.
isn't / snowboarding