Q.people believe that he is an honest man? Change into passive
in the complex sentence ,independent sentence if has no object then we should to make passive 'it or they' should be subject.
Eska passive ni bn skta Kyoki intransitive vrb h..object bhi ni h
It is believed that he is an honest man.
It is believed by people that he is an honest man.
he is an honest man belived by people