passive /personal passive sentences

The Impersonal Passive

structure is used for: Things that are thought, believed, said, or reported.

We form it like this: It + be + past participle of reporting verb + that + clause

“It is believed that the tests have produced false positives.”

Personal Passive sentences

We often use verbs like believe, expect, find, know, report, say, think, or understand.

We form it like this:

Subject + Passive Verb + to-Infinitive : “The tests are known to produce false positives.”