1. I read books in the evening.
2. I don't read books in the morning.
3. I'm writting an exercise now.
4. I'm not writting a letter now.
5. They're playing in the yard now.
6. They aren't playing in the street now.
7. Are they playing in the room now?
8. He helps his mother every day.
9. Does he help his mother every day?
10. He doesn't help his mother every day.
11. Do you go to school on Sunday?
12. My friend doesn't like to play football.
13. I'm not reading now.
14. Is he sleeping now?
15. We don't go to to the country in winter.
16. My sister eats sweets every day.
17. She isn't eating sweets now.
18. They do their homework in the afternoon.