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How passive sentences are formed in different tenses using be + past participle.
The passive voice presents the receiver of an action as the subject of the sentence.
The passive is used when the action, its result, or the receiver is more important than the person who performs it.
The passive is formed with an appropriate form of be followed by the past participle of the main verb.
For example, The letter was sent. The form of be changes according to tense, aspect, person, and number.
The Present Simple passive is formed with am, is, or are followed by the past participle.
For example, English is spoken here and The rooms are cleaned every day.
The Past Simple passive is formed with was or were followed by the past participle.
For example, The building was destroyed in the fire and The documents were signed yesterday.
The Present Continuous passive is formed with am, is, or are + being + past participle.
For example, The road is being repaired and New houses are being built.
The Past Continuous passive is formed with was or were + being + past participle.
For example, The car was being repaired when I arrived.
The Present Perfect passive is formed with have or has + been + past participle.
For example, The work has been completed and Several changes have been made.
The Past Perfect passive is formed with had + been + past participle.
For example, The room had been cleaned before the guests arrived.
The Future Simple passive is formed with will + be + past participle.
For example, The results will be announced tomorrow.
Be going to can be followed by be and a past participle to express a planned or predicted passive event.
For example, The building is going to be demolished next year.
The Future Perfect passive is formed with will have been + past participle.
For example, The project will have been completed by Friday.
A modal passive is formed with modal + be + past participle.
For example, The form must be completed and The problem should be investigated.
A modal perfect passive is formed with modal + have been + past participle.
For example, The documents should have been sent earlier.
Passive infinitives are formed with to be + past participle.
For example, The work needs to be completed and He wants to be informed.
Perfect passive infinitives are formed with to have been + past participle.
For example, She is believed to have been informed earlier.
The passive -ing form is formed with being + past participle.
For example, He dislikes being criticized and She left without being noticed.
The perfect passive -ing form is formed with having been + past participle.
For example, Having been warned several times, he was eventually dismissed.
Negative passive sentences place not after the auxiliary verb.
For example, The door was not locked and The documents have not been signed.
Questions in the passive are formed by placing the appropriate auxiliary before the subject.
For example, Was the letter sent? Has the work been completed? and Will the results be published?
The object of an active sentence normally becomes the subject of the corresponding passive sentence.
For example, They built the house becomes The house was built.
When an active sentence is changed into the passive, the tense and aspect are normally preserved through the appropriate form of be.
For example, They are repairing the road becomes The road is being repaired, while They repaired the road becomes The road was repaired.
Ordinary intransitive verbs generally cannot form a passive because they do not have a direct object that can become the passive subject.
For example, arrive, sleep, and happen do not normally form ordinary passive constructions.
Passive constructions can combine tense and aspect forms when the resulting construction is grammatically natural and useful.
Examples include has been completed, was being repaired, and will have been finished.
The passive is preferred when the receiver of the action, the process, or the result is more important than the agent.
It is especially common when the agent is unknown, obvious, irrelevant, or deliberately omitted.
Form passive constructions with the correct form of be and the past participle.
Common mistakes include using the infinitive instead of the participle, forgetting be, using the wrong tense of be, and confusing being with been.