1 James Earl Ray killed Martin Luther King.
Martin Luther King was killed by James Earl Ray.
2 Harrison Ford played the part of Indiana Jones.
The part of Indiana Jones was played by Harrison Ford.
3 The guests don't make the beds.
The beds aren't made by the guests.
4 My class won the cookery competition.
The cookery competition was won by my class.
5 Millions of people speak Spanish.
Spanish is spoken by millions of people.
6 You didn't write those poems.
Those poems weren't written by you.
7 Cars pollute the air we breathe.
The air we breathe is polluted by cars.
8 My father decorated this room.
This room was decorated by my father.