Поставить во все временные формы должно быть 12 past preset предложение we watch film заранее !

1. We watch film.
2. We will watch film. 
3. We will be watching film.
4. We've been watching film. 
5. We have watched film. 
6. We had watched film. 
7. We watched film. 
8. We had been watching film.
9. We will have been watching film. 
10. We were watching film. 
11. We are watching film. 
12. We will have watched film.
По идее - так. Если не надо добавлять объяснительные конструкции(по типу tomorrow, by 6 o'clock, before...), то это всё. :)