What is the voice used in the sentence: "The proposal was written by the consultant"?

The sentence "The proposal was written by the consultant" is identified as passive voice. In passive voice constructions, the subject of the sentence (in this case, "the proposal") receives the action rather than performing it. Here, the focus is on the proposal and the action taken on it. The doer of the action ("the consultant") is mentioned but is not the subject of the sentence.

In passive voice sentences, the verb is typically formed with a form of "to be" followed by the past participle of the main verb. In this example, "was" (a form of "to be") is used along with "written" (the past participle), fully demonstrating the passive voice. This construction shifts attention from who performed the action to what was acted upon, which is a hallmark of passive voice.`