Answer:
Hope this helps!!!
Explanation:
I bolded what I renewed/answer!
1. We (knew) each other since we were at school.
2. They (played) tennis every Sunday for years.
3. I (did not play) tennis.
4. You don't understand because you (did not listen).
5. How long have you been learning English? (Complete sentence change!)
6. You read the book yet?
7. I ate dinner, so let's go out.
8. I read the book you recommended but I'm not finished.
9. She finished her work already.