Respuesta:
1. They don't play tenis on Saturdays, they play tenis on Fridays.
2. She isn't/is not studying now, she is eating.
3. My parents always go to the cinema on Sunday night, but this Sunday they aren't/are not going to the cinema.
4. Are you playing guitar?
5. They aren't/are not watching a film now. They are listening music.
6. They don't live in Madrid, they live in Sevilla.
7. He isn't speaking, now, he is sleeping.
8. I do my homeworks at the time, I always do my homework in the afternoon.
9. She isn't/is not reading the newspaper at the moment, she is writing a letter.
10. Is he sleeping now?
11. Are you listening to me?
12. Is she driving now?
13. Does he drive very well?
14. I am studying, at the moment.
15. You aren't/are not speaking now.
