Question

change the voice he wrote an letter​

Answer 1

Answer:

An letter was written by him .

Answer 2

$hello$

The sentence is given in active voice.

So, the answer will be in passive voice.

Answer : A letter is written by him.

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Related information :

Question : What is Active Voice ?

➞A form or set of forms of a verb in which the subject is typically the person or thing performing the action and which can take a direct object.

➢ Example (She writes a letter.)

Question : What is Passive Voice?

➞A passive voice construction is a grammatical voice construction that is found in many languages. In a clause with passive voice, the grammatical subject expresses the theme or patient of the main verb – that is, the person or thing that undergoes the action or has its state changed. 

➢ Example ( A letter is being written by her.)

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I hope my answer helps you.....✌