Nobody has made any mistakes.
No mistakes have been made
Two of my dinner plates (break). -present perfect
Two of my dinner plates have been broken (break). -present perfect
Somebody must have taken it while I was out.
It must have been taken away while I was out
They treated us to some ice-ceam.
We were treated to some ice-cream
Somebody will meet the visitors at the station.
The visitors will be met at the station
You must iron this dress for tonight.
This dress must be ironed for tonight
They turned my offer down.
My offer was turned down
No one can answer your question.
Your question cannot be answered by anyone
They will take her to hospital tomorrow.
She will be taken to hospital tomorrow
Somebody will meet the visitors at the station.
The visitors will be met at the station
They tell me somebody has shot your uncle. (2 passives)
(They tell me / I am told) your uncle has been shot
We'll have to examine you again.
You will have to be examined again
People say tortoises live longer than elephants. (Tortoises...)
Tortoises are said to live longer than elephants
I should love someone to take me out to dinner. (passive infinitive)
I'd love to be taken out to dinner
The police are sure to ask you that question.
You will be surely asked thath question by the police (are to+infinitive = future of obligation)
He's so good at golf nobody can beat him.
He is so good (that) he can be beaten at golf
