Mistakes were made · She was considered a genius · Sales rose · It has been done away with
Building on C1
You know every form — now the effect of choosing one
By C1 you have the full range of passive forms. At C2 the question is why a writer chooses — or avoids — the passive, and which verbs behave in unexpected ways.
The agentless passive and responsibility
What the writer chooses not to say
"Mistakes were made."
Admits a problem without saying who made the mistakes.
The decision was taken to close the library.
Who decided? The passive hides it.
Read critically: an agentless passive can be neutral, or it can avoid blame.
Verb + object + complement
considered · elected · deemed · appointed · found
She was considered the best poet of her generation.
He was elected captain.
No as, no to be needed.
The building was deemed unsafe.
The defendant was found guilty.
Ergative verbs: no passive needed
The same verb, with or without a doer
The door opened. / Someone opened the door.
Sales increased by 10%.
Not: sales were increased (unless someone deliberately increased them).