33 lines
1.3 KiB
Markdown
33 lines
1.3 KiB
Markdown
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# Passive Voice
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# Use
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We use the passive to focus on what happened the action or process which takes place. Information about the agent (who or what does the ation) doesnt need to appear in the sentence. The passive is often used in formal writing contexts such as academic, business or legal texts and also when describing processes which consist of a series of stages. The choice between the use of the passive or active form of a verb depends on whether we want to emphasize the action (passive) or the agent (active).
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# How
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We form the passive with the verb be+ the past participle of the main verb. We can use the verb be i all tenses and with modal verbs, although the present perfect continous and past perfect continuous form of the passive are not used very often.
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Furthermore, we us be in the negative and question form to make negative passibel sentences.
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## Tenses
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### Past Simple
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**examples**
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### Past Continuous
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**example**
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_Were_ the subjects in the trial _being monitored_ during the trial
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### Present Perfect
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**example:**
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Several market research surveys _have been carried out_ so far.
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## Modals
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When _will_ the app _be launched_.
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The media _can't be told_ until next week.
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Existing needs _must be_ clearly _identified_.
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Results _should be reviewed_ by peers in academic settings.
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