1 The policeman stopped me when I was crossing street. – I was stopped by the policeman when I was crossing street.

2 They showed the match on television. - The match was shown on television.

3 We bought these newspaper and magazine yesterday. - These newspapers and magazines were bought yesterday by us.

 4 My dad did all the cooking when we on a hiking tour. - When we were on a hiking tour all the cooking was done by my dad.

5 They sold their farm the other day. - Their farm was sold the other day.

6They built the church in the 16th century. - The church was built in the 16th century.

7 We burnt the dry leaves last Sunday. - Dry leaves were burnt by us last Sunday.   

8 They found this old silver coin during their trip to the mountains. - This old silver coin was found by them during their trip to the mountains. 

9 Some people cooked the food, some laid the table, somebody bought small gifts. Everything was ready for the party. - Everything was ready for the party. The food was cooked, the table was laid, small gifts were bought.   

10 ) I wear this dress only on special occasions. - This dress is worn by me only on special occasions.

11 They grow coffee in Brazil. – Coffee is grown in Brazil.