Yes, you can use "by everybody" in passive voice. In passive constructions, the agent (the doer of the action) is introduced with the preposition "by." When the agent is vague or general (e.g., "everyone," "people," or "somebody"), you can use phrases like "by everybody." For example: - Active: "Everybody loves the song." - Passive: "The song is loved by everybody." However, in passive voice, the agent ("by everybody") is often omitted unless it’s necessary for clarity. Passive sentences with an unspecified or general agent are frequently more natural without explicitly stating who performed the action: - "The song is loved" (omitting "by everybody," which is implied).

Any noun or pronoun that can be the subject of an active sentence can also be the "actor" in a passive sentence.

Sure: "Fun was had by everybody." "The mistake was made by everybody."

Yes