1. They believe he will be the winner.
⇒ It is believed that he will be the winner.
2. People think that Tom stole food in the supermarket 3 days ago.
⇒ Tom is thought to steal food in the market 3 days ago.
3. Someone reported that the situation was under control.
⇒ The situation was reported to be under control.
4. It is said that she works 16 hours a day.
⇒ She is said to work 16 hours a day.
5. Someone thinks that the company is planning a new advertising campaign.
⇒ The company is thought to plan a new advertising campaign.
~Good luck~