1. they grow rice in tropical countries.
=> Rice is grown in tropical countries
2. Mr.Green loves his children very much.
=> Children are loved very much by Mr.Green
3. people don't speak french here.
=> French isn't spoken here
4. someone broke his windows last night.
=> His windows was broken last night
5. the police didn't find the lost boy yesterday.
=> The lost boy was't found by police yesterday