Question

My wife has answered all her letters.(passive voice)

Answer 1

All her letters have been answered by my wife.

Answer 2

All the letters have been answered by my wife.

In this sentence, the active voice is "my wife has answered all her letters," where "my wife" is the subject, "has answered" is the verb, and "all her letters" is the object.

To change it to passive voice, we need to make the object of the active voice sentence ("all her letters") the subject of the passive voice sentence and make the subject of the active voice sentence ("my wife") the agent in the passive voice sentence.

So, "all her letters" becomes the new subject, "have been answered" becomes the passive verb, and "by my wife" is added to indicate the agent.

Therefore, the sentence "My wife has answered all her letters" in the passive voice becomes "All the letters have been answered by my wife."