Could you explain to me this grammar point, please? Active voice: "Someone cleans the room every day." Passive voice:

a. The room is cleaned by someone every day
b. The room is cleaned every day by someone
c. The room is cleaned every day.

All the cases are true?

2 Answers 2


All your examples are grammatical examples of passive-voice forms of the original sentence, although option C loses some information.

Whether they are true is another matter.


I personally think C is the best answer. This is because the agent or the performer of the action is not clear. Therefore, we tend not to bring back the unclear subjects in passive sentence.

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