1. The atmosphere protects the earth from harmful radiation from the sun.
⇒ The earth is protected from harmful radiation from the sun by the atmosphere.
2. Did anyone see you come in?
⇒ Were you seen come in?
3. He hates people staring at him.
⇒ He hates being stared at.
4. Someone will tell her which bus to catch.
⇒ She will be told which bus to catch.
5. Thieves broke into the house.
⇒ The house was broken into by thieves.
6. His mother did not take care of him.
⇒ He was not taken care of by his mother.
7. They will inform you of the result of the exam by letter.
⇒ You will be informed of the result of the exam by letter.
8. When will they open the shop?
⇒ When will the shop be opened?
9. They will serve fish to the guests about ten minutes from now.
⇒ Fish will be served to the guests about ten minutes from now.
10. They have sold thousands of CD machines since 1980.
⇒ Thousands of CD machines have been sold since 1980.
11. That company will publish a textbook next year.
⇒ A textbook will be published by that company by next year
12. My friends told me to change the way.
⇒ I was told to change the way by my friend
13. Shakespeare wrote many famous plays.
⇒ Many famous plays were written by Shakespeare.
14. Bill will invite Ann to the party.
⇒ Ann will be invited to the party by Bill
15. Alex is preparing that report.
⇒ That report is being prepared by Alex
16. The teacher is going to explain the lesson.
⇒ The lesson is going to be explained by the teacher
17. Kathy had returned the book to the library.
⇒ The book had been returned to the library by Kathy
18. Does professor Jackson teach that course?
⇒ Is the course taught by professor Jackson?
19. Is Mrs. Brown painting your house?
⇒ Is your house being painted by Mrs. Brown?
20. Doctor Ikeda developed that theory.
⇒ That theory was developed by doctor Ikeda
21. A storm destroyed the small fishing village
⇒ The small fishing village was destroyed by a storm
22. Hundreds of people visit the Washington Monument each day.
⇒ The Washington Monument is visited by hundreds of people every day