1. They are playing the piano. - They aren't playing the piano. 2. I am talking. - I am not talking. 3. He is writing. - He isn't writing. 4. She is dancing. - She isn't dancing. 5. We are jumping. - We aren't jumping. 6. She is walking. - She isn't walking. 7. We are watching TV. - We aren't watching TV. 8. You are driving a car. - You aren't driving a car. 9. I am reading. - I am not reading. 10. He is making a sandcastle. - He isn't making a sandcastle. 11. They are painting a picture. - They aren't painting a picture. 12. You are singing a song. - You aren't singing a song.