| Bill Gates gave the presentation. | The presentation was given by Bill Gates. |
| They make these watches in Switzerland. | These watches are made in Switzerland. |
| The company sacked her. | She was sacked by the company. |
| A Scotsman discovered Penicillin. | Penicillin was discovered by a Scotsman. |
| The men kept me in the dark. | I was kept in the dark by the men. |
| They grow coffee in Brazil. | Coffee is grown in Brazil. |
| Egyptians built the Pyramids. | The Pyramids were built by Egyptians. |
| The company doesn't produce those models. | Those models aren't produced by the company. |
| How do they make pizza? | How is pizza made? |
| A dog bit the child last night. | The child was bitten by a dog last night |
