Be was/were been
Play played played
Eat ate eaten
Go went gone
Write wrote written
Try tried tried
Have had had
Do did done
See saw seen
Work worked worked
2. 1. Just
2.yet
3.just
4. Just
5. Ever
3. 1. Should
2. Shouldn’t
3. Should
4. Should ? Смотря от контекста
5. Should