1/ The teacher told me to do more exercises at home.
-> I was told to do more exercises at home by the teacher.
2/ My mother owners a lot of money to the bank.
-> A lot of money is owned to the bank by my mother.
3/ Tom doesn't prepare his lessons well before class.
-> Tom's lessons aren't prepared well before class.
4/ Last night we were watching TV when it started to rain
-> Last night ,TV was being watched when it started to rain.
5/ People are destroying large areas of forest every day.
-> Large areas of forest are being destroyed by people every day.