1. They
should have cleaned the windows. - The windows should have been cleaned by them.
2. I could
hear the music from far away. - The music could be heard by me from far away.
3. Has
someone repaired the machine? - Has the machine been repaired by someone?
4. I'm not
going to the party. No one invited me. - I'm not going to the party. I wasn’t invited
by anyone.
5. They
didn't tell Jim about the change of plans. - Jim wasn’t told by anyone about
the change of plans.
6. I will
send the letter by fax. - The letter will be sent by me by fax.
7. Mrs.
White runs this hotel. - This hotel is run by Mrs. White.
8. He might
take us to the airport in this car. - We might be taken to the airport by him
in this car.