Решение:
Нужно переписать предложения, изменив их на отрицательные, по образцу: She is watching TV. - She isn't watching TV.
- They are playing the piano. - They aren't playing the piano.
- I am talking. - I am not talking.
- He is writing. - He isn't writing.
- She is dancing. - She isn't dancing.
- We are jumping. - We aren't jumping.
- She is walking. - She isn't walking.
- We are watching TV. - We aren't watching TV.
- You are driving a car. - You aren't driving a car.
- I am reading. - I am not reading.
- He is making a sandcastle. - He isn't making a sandcastle.
- They are painting a picture. - They aren't painting a picture.
- You are singing a song. - You aren't singing a song.