1. Shakespeare wrote that play

PASSIVE : That play was written by Shakespeare

2. Bill will invite Ann to the party

PASSIVE : Ann will be invited by Bill to the party

3. Alex is preparing that report

PASSIVE : That report is being prepared by Alex

4. Waitresses and waiters serve customers

PASSIVE : Customers are served by waitresses and waiters

5. The teacher is going to explain the lesson

PASSIVE : The lesson is going to be explained by the teacher

6. Shirley has suggested a new idea

PASSIVE : A new idea has been suggested by Shirley

7. Two horses were pulling the farmer's wagon

PASSIVE : The farmer's wagon was being pulled by two horses

8. Kathy had returned the book to the library

PASSIVE : The book had been returned to the library by Kathy

9. By this time tomorrow the president will have made the announcement

PASSIVE : By this time tomorrow the announcement will have been made by the president

10. I didn't write that note, Jim wrote it.

PASSIVE : That note was not written by me, it was written by Jim.

11.  Alice didn't make that pie. Did Mrs. French make it?

PASSIVE : That pie was not made by Alice. Was it made by Mrs. French?

12. Does Prof. Jackson teach this course? I know that Prof. Adams doesn't teach it.

PASSIVE : Is this course taught by Prof. Jackson? I know that it is not taught by Prof. Adams

13. Mrs. Andrews hasn't signed those papers yet. Has Mr. Andrews signed them yet?

PASSIVE : Those papers haven't been signed by Mrs. Andrews. Have them been signed by Mr. Andrews?

14. Is Mr. Brown painting your house?

PASSIVE : Is your house being painted by Mr. Brown?

15. His tricks won't fool me

PASSIVE : I won't be fooled by his tricks.