The hotel staff clean the rooms every morning.
The rooms are cleaned every morning by the hotel staff.
The car was repaired by Sam.
What is...Sam repaired the car.
The passive voice is used if you don't know who preformed the action descried in the sentence.
What is... Correct.
"Timothy has kissed Jane." This is written in active voice.
What is... True.
Once a week, John cleans the garage.
What is... Once a week, the garage is cleaned by John.
Right now, the letter is being written by Sarah.
This company produces electric cars.
The students have completed the project
What is... The project has been completed by the students.
A charity concert will be organised by the school.
The school will organise a charity concert.
This programme is watched by millions of people. This is is passive voice.
True.
The school will organise a charity concert.
What is... My bicycle has been stolen.
My bicycle has been stolen.
Someone has stolen my bicycle.
The passive voice is used when the receiver of the action is not a passive recipient of the action.
What is.. Incorrect: It is only used when the receiver IS a passive recipient.
The storm damaged several houses last night.
What is...Several houses were damaged by the storm last night.
Fresh meals are prepared every day by the chef.
The chef prepares fresh meals every day.
"The old man was murdered." Can be put into active voice form.
Correct: the subject of the sentence will be Someone