51.2
1) - the past
2) - the future
3) - the past
4) - the present
5) - the past
51.3
1. I never go to swimming on Fridays.
2. (True about me)
3. I sometimes watch TV.
4. (True about me)
5. I rarely wear a hat.
6. (True about me)
7. I never go to bed at 10.
8. I often go to the theatre.