1. People in Africa drink a lot of water. - A lot of water is drunk by people in Africa.
2. Workers built the house in one week. - The house was built by workers in one week.
3. The teacher often speaks to me. - I am often spoken to by the teacher.
4. My brother is writing letters in his room. - Letters are being written by my brother in his room.
5. The policeman stopped Jim when he was crossing the street yesterday. - Jim was stopped by the policeman when he was crossing the street yesterday.
6. We can't see the ship anywhere now. - The ship can't be seen anywhere now.
7. I have been making cakes all the morning. - Cakes have been made by me all the morning.
8. I have already written the letter. - The letter has already been written.
9. Mary was reading a newspaper yesterday at five. - A newspaper was being read by Mary yesterday at five.
10. The boys were playing cards. - Cards were being played by the boys.