1, It is believed that he may be fired.
- He is believed to be fired.
2, It was said that he was in love with his secretary.
- He was said to have been in love with his secretary.
3, It is expected that robots will take people's jobs.
- Robots are expected to take people's jobs.
4, It is known that Michael has been unemployed for quite some time.
- Michael is known to have been unemployed for quite some time.
5, It is believed that Bob spent all his money on gambling the other night.
- Bob is believed to have spent all his money on gambling the other night.
6, It is claimed that machines do all the heavy work for us.
- Machines are claimed to do all the heavy work for us.