Passive

1. Does Stephan set the timer?
   No, the timer by Stephan.

2. The artist sings three song.
   Are three songs by the artist?

3. Mr Brown takes the umbrellas.
    Yes, the umbrellas by Mr Brown.

4. The policeman does a good job.
     Is a good job by the policeman?

5. Do my friends find my keys?
    Yes, my keys by my friends.

6. The scientist writes a book.
    A book by the scientist.