Once a week, Tom cleans the house.
Once a week, the house is cleaned by Tom.
Right now, Sarah is writing the letter
Right now, the letter is being written by Sarah.
Sam repaired the car.
The car was repaired by Sam.
The salesman was helping the customer when the thief came into the store.
The customer was being helped by the salesman when the thief came into the store
Many tourists have visited that castle.
That castle has been visited by many tourists.
Present Perfect Continuous
Recently, John has been doing the work
Recently, the work has been being done by John.
George had repaired many cars before he received his mechanic's license
Many cars had been repaired by George before he received his mechanic's license
Past Perfect Continuous
Chef Jones had been preparing the restaurant's fantastic dinners for two years before he moved to Paris.
The restaurant's fantastic dinners had been being prepared by Chef Jones for two years before he moved to Paris
Simple Future will
Someone will finish the work by 5:00 PM.
The work will be finished by 5:00 PM.
Simple Future be going to
Sally is going to make a beautiful dinner tonight.
A beautiful dinner is going to be made by Sally tonight
Future Continuous will
At 8:00 PM tonight, John will be washing the dishes
At 8:00 PM tonight, the dishes will be being washed by John.
Future Continuous be going to
At 8:00 PM tonight, John is going to be washing the dishes
At 8:00 PM tonight, the dishes are going to be being washed by John
My mother would always make the pies.
The pies would always be made by my mother.
Future in the Past Would
I knew John would finish the work by 5:00 PM.
I knew the work would be finished by 5:00 PM
Future in the Past Was Going to
I thought Sally was going to make a beautiful dinner tonight.
I thought a beautiful dinner was going to be made by Sally tonight
Passive active questions
A: Julie washed the car
P: the car was washed by Julie
A: did Julie washed the car?
P: was the car washed ?
The verbs has, have, had, will, shall, can, may etc., do not change their position at the beginning of the sentence when the active voice is changed to the passive voice.
The question words when, why, where, how or what does not change their position at the beginning of the sentence when the active voice is changed into the passive voice. Note that who changes to by whom and whom into who.