1. I <span>read books in the evening.</span>
<span> 2. I do not read books in the morning.</span>
<span> 3. I am writing an exercise now. </span>
<span>4. I am not writing a letter now.</span>
<span> 5. They are playing in the yard now.</span>
<span> 6. They aren't playing in the street now.</span>
<span> 7. Are they playing in the room now?</span>
<span> 8. He helps his mother every day.</span>
<span> 9. Does he help his mother every day? </span>
<span>10. He doesn't help his mother every day.</span>
<span> 11. Do you go to school on Sunday?</span>
<span> 12. My friend doesn't like to play football.</span>
<span> 13.I'm not reading now.</span>
<span> 14. Is he sleeping now?</span>
<span> 15.We don't go to the country in winter.</span>
<span> 16.My sister eats sweets every day.</span>
<span> 17. She isn't eating sweets now.</span>
<span> 18. They do their homework in the afternoon.</span>
<span> 19. They don't go for a walk in the evening.</span>
<span> 20. My father doesn't work on Sunday.</span>
<span> 21. He works every day.</span>