1. If you don't break the rules,the teacher won't punish you
=> if the rules aren't broken, you won't be punished by the teacher
2. If Tom threw a party,I would refuse his invitation
=> if a party was thrown by tom, his invitation would be refused by me
3. If the teacher had corrected the exercises,the students wouldn't have made many mistakes
=> if the exercises had been corrected by the teacher, many mistakes wouldn't have been made by the students
4. If Marry didn't accept his proposal,he might sell his house
=> if his proposal wasn't accepted by mary, his house might be sold
5. She won't buy this car if it dosen't appear any new features
this car won't be bought by her if new features aren't appeared
6. John sells his house beacause ghost haunt it
john's house is sold by him because it is haunted by ghost