| A | B |
| I write a detective novel. | A detective novel is wrtten by me. |
| Magallanes named the Pacific Ocean. | The Pacific Ocean was named by Magallanes. |
| A robber will steal a diamond from the gallery. | A diamond will be stolen from the gallery by a robber. |
| The dog is disturbing at a cat. | A cat is being disturbed by the dog. |
| Andrea Bocelli was singing a Christmas song last night. | A Chirstmas song was being sung by Andrea Bocelli. |
| The car is going to break a fence. | A fence is going to be broken by the car. |
| The scientists have discovered new information about Mars. | New information about Mars have been discovered by thescientists. |
| Ligia had read a novel named The Iliada. | A novel named The Iliada had been read by Ligia. |
| By The 2005 The doctors will have eliminated the AIDS disease. | By the 2005 The AIDS disease will have been eliminated by the doctors. |