Ответ:

1. went вместо go

2. bought вместо buyed

3.finished вместо finish

4.were вместо was и перед was you лишнее получается вроде

5. were вместо was

6. либо was лишнее либо were leaving вместо was leaving если вы проходили Past Perfect

7. bore вместо born

8. were вместо was

я буду дописывать по мере догадки остальное