Change into passive voice
1 If you don't break the rules,the teacher won't punish you
--> If the rules aren't broken, I won't be punished by the teacher.
2 If Tom threw a party,I would refuse his invitation
--> If a party isn't thrown by Tom, his invitation wuold be refused.
3 If the teacher had corrected the exercises,the students wouldn't have made many mistakes
--> If the excercises 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 Marry, 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 if any new features aren't appeared.
6 John sells his house beacause ghots haunt it
--> His house is sold by John because it is huanted by ghosts.