Вообще, вроде бы нужен перфект, а не просто паст, но давайте попробуем так:
1) His work was finished by Tim early.
2) Did Tim finish his work early?
3) Tim didn't finish his work early.
4) His work wasn't finished by Tim early.
5) When Tim finished his work?
6) Did Tim finish his work on time?
7) Whether did Tim finish his work?
8) I think Tim didn't finish his work early
