Question

Change of voice

Type these letters at once.

Answer 1

Once type these letters

Answer 2

The answer is, “These letters must be typed by you at once.”

While changing the sentence voice, you need to keep in mind about the subject that is performing an action.

This whole concept is elaborated by a certain verb.

An action and a subject are the essential part of a sentence.

Hence, they will be swapped among each other as per their verb.