The baby AM / IS / ARE sleeping.
IS >> The baby is sleeping.
They ARE / AREN'T / ISN'T / IS playing football.
They aren't playing football. They're playing volleyball.
Woody AM / IS / ARE studying.
Woody is studying.
Is Bob reading a book?
No, he isn't. He's watching TV.
What is he doing?
He's walking his dog. // He's taking his dog for a walk.
Nick ARE / IS / AREN'T / ISN'T playing the piano.
Nick isn't playing the piano. He's playing the guitar.
Maria ARE / AM / AREN'T / ISN'T / IS watching a film.
Maria isn't watching a film. She's listening to music.
