Impersonal passives focus on the action/report, not the source.
The passive verb agrees with the (not the original object). passive impersonal exercises
It is believed him to be honest. ❌ → He is believed to be honest. Impersonal passives focus on the action/report, not the
He is said to be ill. → It is said that he is ill. Impersonal passives focus on the action/report
People think the film is good. → The film is thought to be good.