The be-passive can also interact with complements such as that-clauses and infinitives, producing complex passives.
It is rumored that will get the job.
That he will get the job has been decided.
John is thought to be intelligent.
We consider these fully in chapters 31 and 32.
Passive Only
The passive is more limited then the active voice in that only transitive verbs may be in the passive. In fact, some passive sentences in English have no active voice counterpart, such as
Mehdi was born in Tehran.
?His mother bore Medhi in Tehran.
There is of course the active verb “to bear”, as in “The lioness bore three cubs.” However, for all intents and purposes, there is no active voice counterpart to to be born to talk about facts concerning human birth. Other verbs that occur commonly in the passive are be deemed, be fined, be hospitalize, be jaild, be scheduled, be shipped, be staffed, be suspended.