1. - It is thought that he has died a natural death.
- He is thought to have died a natural death.
2. - It is believed that thirteen is an unlucky number.
- Thirteen is believed to be an unlucky number.
3. - It is said that John is the brightest student in class.
- John is said to be the brightest student in class.
4. - It was reported that the President had suffered a heart attack.
- The president was reported to have suffered a heart attack.
5. - It was known that they had told him of the meeting.
- They were known to have told him of the meeting.
