Passive Voice
Use:
Passive voice is used when the focus is on the action. It is not important or not known, however, who or what is performing the action. The passive voice is a grammatical construction (specifically, a "voice") in which the subject of a sentence or clause denotes the recipient of the action (the patient) rather than the performer (the agent). Passive voice is formed with an auxiliary verb (usually be or get) plus a participle (usually the past participle) of a transitive verb.
Example:
TENSE
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Active
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Passive
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Simple Present
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He writes a letter
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A letter is written by him
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Simple Past
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He wrote a letter
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A letter was written by him
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Present Progressive
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He is writing a letter
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A letter is being writing by him
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Past Progressive
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He was writing a letter
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A letter was being written by him
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Present Perfect
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He has written a letter
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A letter has been written by him
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Past Perfect
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He had written a letter
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A letter had been written by him
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Future with Will
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He will write a letter
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A letter will be written by him
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Future with going to
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He is going to write a letter
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A letter is going to be written by him
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Conditional
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He would write a letter
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A letter would be written by him
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Hilfsverben
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He can write a letter
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A letter can be written by him
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Active Voice
In active voice focuses mainly PERSON PERFORMING AN ACTION
Tom writes a letter
Tom is writing a letter
Tom was writing a letter
Tom wrote a letter
Tom has written a letter
Tom had written a letter
Tom will write a letter
Tom is going to write a letter
Tom can write a letter
Tom could write a letter
Tom must write a letter
Tom may write a letter
