Note: For a detailed explanation of why we use the passive voice, please read this lesson.
Only sentences that have the object of a verb can be changed to the passive voice.
Active voice: I invited John .
[subject] + [verb] + [ object ]
Passive voice: John was invited by me.
In a passive sentence, the object of the verb (in the active sentence) becomes the subject. This is the structure for the passive voice:
John was invited (by me).
[subject] + [ BE + Past Participle] (by actor)
The (by actor) part of the sentence is optional.
An active sentence that does not have an object cannot be made into the passive voice.
Active voice: She cried. (The verb has no object, so you cannot make a passive sentence)
Active voice: An accident happened. (Again, no object, so you cannot form a passive sentence)
Intransitive verbs, verbs that never have an object, like be, die, happen, exist, appear can never be made into the passive voice. Only transitive verbs (enjoy, kill, catch, show) can be used in the passive voice. (Hint: They are called transitive because you can transfer an object to them.)
A ghost appeared . (The intransitive verb 'appear' has no object.)
Guideline 1: If the sentence does not contain BE + Past Participle, then it cannot be a passive sentence.
John was eating a snack. (Not passive — no BE + Past Participle)
Guideline 2: Look at the subject of the sentence and then the verb . Then ask yourself if the subject is the actor of the verb (did John eat?) or was the subject the object of the verb (Did someone eat John?). If the subject is the actor, then it's an active sentence. If the subject is the object of the verb, then it's a passive sentence.
Let's try some exercises.
The problem wasn't fixed by me.
The town is protected by the police.
John was raised in a small town by his mother. (note: the 'by his mother' phrase can be after the verb or at the end of the sentence)
The building was painted last year (by someone).
Penicillin was discovered in 1928 by Alexander Fleming.
Grammar is studied on the Internet by some students.
Look at the subject and verb to determine if it is an active or passive sentence. Then add the appropriate verb. Use the Past Simple tense for this exercise.
Let's try some more advanced structures.
Mark if the sentence is in the active or passive voice. (Remember to look for the BE + Past Participle structure.)
The window had been broken (by someone) by 3:00 p.m.
We were being watched by a strange man.
The Olympics will be held in* Tokyo in 2020. (*'in' is more natural here than 'by', though 'by' is correct also.)
The report is being worked on right now (by us).
He has been told (by my manager) to arrive earlier.
The mistake could not have been made by them.
I hope I am going to be hired by them soon.
Look at the subject and verb to determine if it is an active or passive sentence. Then add the appropriate verb. Be careful with intransitive verbs (verbs that do not have an object — they cannot be used in the passive voice.)
I hope these passive voice exercises have been useful. Find a mistake? Have a question? Leave a comment below.
-- Created by Matthew Barton of Englishcurrent.com (copyright)
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