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

=>

1. The earth is protected from harmful radiation from the sun by the atmosphere.

2. Were you seen to come in?

3. He hates being stared at.

4. She will be told which bus to catch.

5. The house was broken into by thieves.

6. He wasn't taken care of by his mother.

7. You will be informed the result of the exam by letter.

The result of the exam will be informed you by letter.

8. When will the shop be opened.

9. Fish will be served to the guests about ten minutes from now.

10. Thousands of CD machines have been sold since 1980.

11. A textbook will be published by that company next year.

12. I was told to change the way by my friends.

13. Many famous plays were written by Shakespeare.

14. Ann will be invited to the party by Bill.

15. That report is being prepared by Alex.

16. The lesson is going to be explained by the teacher.

17. The book had been returned to the library by Kathy.

18. Is the course taught by professor Jackson?

19. Is your house being painted by Mrs.Brown?

20. That theory was developed by doctor Ikeda. 

21. The small fishing village was destroyed by a storm.

22. The Washington Monument is visited by hundreds of people each day.