1. I read books in the evening. 
2. I don't read books in the morning. 
3. I'm writing an exercise now. 
4. I'm not writing a letter now. 
5. They are 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 the country in the winter. 
16. My sister eats sweets every day. 
17. She isn't eating sweets now. 
18. They do their homework in the afternoon. 
19. They don't go for a walk in the evening. 
20. My father doesn't work on Sunday. 
21. He works every day.

1 read
2 don t read
3 i ' m writing
4 I ' m not writing
5 they are playing
6 they aren t playing
7 Are they playing
8 helps
9 does he help
10 he doesn t help
11 do you go 
12 doesnt like
13 I m not reading
14 is he sleeping
15 don t go 
16 eats
17 isn t eating
18 do
19 don t go
20 doesn t work
21 he works