EXPLANATION OF PASSIVE VOICE

Use of Passive

Passive voice is used when the focus is on the action. It is not important or not known who or what is performing the action.

Example: My bike was stolen.

In the example above, the focus is on the fact that my bike was stolen. I do not know who did it.

Sometimes a statement in passive is more polite than active voice, as the following example shows:

Example: A mistake was made.

In this case, I focus on the fact that a mistake was made, but I do not blame anyone (e.g. You have made a mistake.).

Form of Passive

Subject + finite form of to be + Past Participle (3rd column of irregular verbs)

Example: A letter was written.

When rewriting active sentences in passive voice, note the following:

• the object of the active sentence becomes the subject of the passive sentence
• the finite form of the verb is changed (to be + past participle)
• the subject of the active sentence becomes the object of the passive sentence (or is dropped)

Examples of Passive 

Tense		Subject	Verb	Object
Simple Present	Active:	Rita	writes	a letter.
	Passive:	A letter	is written	by Rita.
Simple Past	Active:	Rita	wrote	a letter.
	Passive:	A letter	was written	by Rita.
Present Perfect	Active:	Rita	has written	a letter.
	Passive:	A letter	has been written	by Rita.
Future I	Active:	Rita	will write	a letter.
	Passive:	A letter	will be written	by Rita.
Hilfsverben	Active:	Rita	can write	a letter.
	Passive:	A letter	can be written	by Rita.

Examples of Passive 

Tense		Subject	Verb	Object
Present Progressive	Active:	Rita	is writing	a letter.
	Passive:	A letter	is being written	by Rita.
Past Progressive	Active:	Rita	was writing	a letter.
	Passive:	A letter	was being written	by Rita.
Past Perfect	Active:	Rita	had written	a letter.
	Passive:	A letter	had been written	by Rita.
Future II	Active:	Rita	will have written	a letter.
	Passive:	A letter	will have been written	by Rita.
Conditional I	Active:	Rita	would write	a letter.
	Passive:	A letter	would be written	by Rita.
Conditional II	Active:	Rita	would have written	a letter.
	Passive:	A letter	would have been written	by Rita.

Passive Sentences with Two Objects 

Rewriting an active sentence with two objects in passive voice means that one of the two objects becomes the subject, the other one remains an object. Which object to transform into a subject depends on what you want to put the focus on.

	Subject	Verb	Object 1	Object 2
Active:	Rita	wrote	a letter	to me.
Passive:	A letter	was written	to me	by Rita.
Passive:	I	was written	a letter	by Rita.

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As you can see in the examples, adding by Rita does not sound very elegant. That’s why it is usually dropped.

Personal and Impersonal Passive

Personal Passive simply means that the object of the active sentence becomes the subject of the passive sentence. So every verb that needs an object (transitive verb) can form a personal passive.

Example: They build houses. – Houses are built.

Active / Passive Verb Forms

Sentences can be active or passive. Therefore, tenses also have "active forms" and "passive forms." You must learn to recognize the difference to successfully speak English.

Active Form

In active sentences, the thing doing the action is the subject of the sentence and the thing receiving the action is the object. Most sentences are active.

[Thing doing action] + [verb] + [thing receiving action]

Examples:

Passive Form

In passive sentences, the thing receiving the action is the subject of the sentence and the thing doing the action is optionally included near the end of the sentence. You can use the passive form if you think that the thing receiving the action is more important or should be emphasized. You can also use the passive form if you do not know who is doing the action or if you do not want to mention who is doing the action.

[Thing receiving action] + [be] + [past participle of verb] + [by] + [thing doing action]

Examples:

Active / Passive Overview

	Active	Passive
Simple Present	Once a week, Tom cleans the house.	Once a week, the house is cleaned by Tom.
Present Continuous	Right now, Sarah is writing the letter.	Right now, the letter is being written by Sarah.
Simple Past	Sam repaired the car.	The car was repaired by Sam.
Past Continuous	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.
Present Perfect	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.
Past Perfect	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.
Future Perfect will	They will have completed the project before the deadline.	The project will have been completed before the deadline.
Future Perfect be going to	They are going to have completed the project before the deadline.	The project is going to have been completed before the deadline.
Future Perfect Continuous will	The famous artist will have been painting the mural for over six months by the time it is finished.	The mural will have been being painted by the famous artist for over six months by the time it is finished.
Future Perfect Continuous be going to	The famous artist is going to have been painting the mural for over six months by the time it is finished.	The mural is going to have been being painted by the famous artist for over six months by the time it is finished.
Used to	Jerry used to pay the bills.	The bills used to be paid by Jerry.
Would Always	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.