13. She hasn't taken her little son to the theatre yet, but she took him to the cinema some days ago.
14. We were playing football at 7 p.m. yesterday.
15. He played football at school.
16,I haven't played football since 1983.
17. This little girl helps her mother very often.
18. This young man wrote his first book in 1985.
19. İt is 7 o'clock in the morning,John has already got up. He got up earlier yesterday morning.
20.We'll play football tomorrow.