2. You must clean the wall before you paint it.
-> The wall must be cleaned before you paint it.
3. They told the new pupil where to sit.
-> The new pupil was told where to sit.
4. I knew that they had told him of the meeting.
-> I knew that he had been told of the meeting.
5. Nobody has ever treated me with such kindness.
-> I have never been treated with such kindness.
6. No one believes this story
-> This story isn't believed.
7. A sudden increase in water pressure may break the dam
-> The dam may be broken by a sudden increase in water pressure.
8. We must take good care of books borrowed from library
-> Books borrowed from library must be taken good care of.
9. A man I know told me about it
-> I was told about it be a man I know.
10. We can never find him at home hor he is always on the move
-> He can never be found at home for he is always on the move.