Krys has eaten 4 kilos of bigos.
4 kilos of bigos have been eaten by Krys.
Anna was going to be attacked by Ola.
Ola was going to attack Anna.
The passive voice can be used if you don't know or it's unimportant who preformed the action described in the sentence.
Correct.
ride
ridden
8 people _________ (attend) the lesson today.
8 people are attending the lesson today.
Where _________________ (you / get / hair / cut) usually?
do you get your hair cut
Maja should tell us a joke every lesson
We should be told a joke by Maja every lesson.
I wouldn't be surprised if Adam was kidnapped by aliens.
I wouldn't be surprised if aliens kidnapped Adam.
Any active voice sentence can be changed to passive voice
Absolutely not!
provide
provided
Before the lesson started, Maria __________ (write) "Maria was here. Legia forever!" on the toilet door.
Before the lesson started, Maria had written "Maria was here. Legia forever!" on the toilet door.
I __________________ yesterday. (get / eyes / test)
got my eyes tested
Many people believe that Hania is a secret agent.
It is believed (by many people) (that) Hania is a secret agent.
Damian's answers in the last test must have been copied by Eryka.
Eryka must have copied Damian's answers in the listening practice test.
Passive voice can be used in any tense
In theory, yes; however, it's very rare to use it in present perfect continuous and past perfect continuous. It's too difficult to say.
spend
spent
Hours and hours __________ (must, spend) by Krys on his last piece of writing.
Hours and hours must have been spent by Krys on his last piece of writing.
You shouldn't _________________ (have / nails / paint) there. The service is terrible.
have your nails painted
Five dwarves were following Anna on her way to British Council today.
Anna was being followed by five dwarves on her way to British Council today.
Adam was supposed to have been trained how to fish by the Queen
The Queen was supposed to have trained Adam how to fish.
We cannot ever use "let" in passive voice
False
intend
intended
Ola ___________ (think about) by Donald Trump right at this moment!
Ola is being thought about by Donald Trump right at this moment!
Unfortunately, I ________________ many times. (have / bag / steal)
have had my bag stolen
On Christmas Day, millions of people will be having arguments with their family about Brexit in the UK.
On Christmas Day, arguments will be being had by millions of people with their family about Brexit in the UK.
Sacha was made to dance by his wife at the party.
His wife made Sacha dance at the party.
Passive Voice was invented in the 14th century by Sir Arthur Passive in the book "The Reformation of English".
Seriously?
determine
determined
My day ________________ (be) a disaster so far.
My day has been a disaster so far.
I can't give you a lift tomorrow because I (have / car / fix) ______________ at the moment.
am having my car fixed