What's the verb?
climb
What's the verb?
skate
What's she doing?
swimming
What's the verb?
fish
What's the verb?
dance
What's he doing?
fishing
What's he doing?
CLIMBING
What are they doing?
sailing
What's the verb?
sail
What's this?
outside
What's she doing?
skating
What are they doing?
dancing
What's this?
inside
What's the verb?
swim