He/cook (+)
He´s cooking.
What is it doing?
It is swimming.
She/play computer games (-)
She isn´t playing computer games.
What are they doing?
They are playing tennis.
They/chat to friends online (+)
They´re chatting to friends online.
It/write emails (+)
It´s writing emails.
He/listen to music (-)
He isn´t listening to music.
She/do her homework (?)
Is she doing her homework?
What is he doing?
He is watching TV.
It/ride a bike (¿)
Is it riding a bike?
We/skateboard (+)
We´re skateboarding.
They/surf the internet(+)
They´re surfing the internet.