1.I don't write a letter.
2. Richard doesn't walk to school.
3. We didn't live in that house.
4. My father is not working in the garden.
5. Yesterday at 5 o’clock they were not watching TV.
6. Last month we did not travel to London.
7. I have not read this book.
8. We are not at home on Sundays.
9. The book does not lie on the table. 10. They did not take part in the competition last week.