The correct passive form is "The room has been cleaned."
Because it shifts focus to the object, and the present perfect tense is maintained in the passive voice.
Given sentence is in passive voice and Contains model verb.
Rule : Subject + Cannot + V1 + Other agents.
Active: I cannot wear this shirt any longer
Passive: This shirt cannot be worn by me any longer
She says that she keeps at an arm's length all those who try to flatter her.
This is the correct way to report the original direct speech sentence in indirect speech.
When converting direct speech to indirect speech:
The passive sentence "The lunch was enjoyed by the guests" is converted to active voice as "The guests enjoyed the lunch".
This showing the guests as the doers of the action.
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The given sentence is in active voice and it is in Present Perfect Tense.
Rule : Subject + (has /have) + been + V3 + Other agents.
The instructor asked Ronny if he was ready for the race.
The passive sentence "Her face is being washed by Huma" is converted to the active voice as "Huma is washing her face".
It indicating the subject (Huma) is performing the action.
Bala's mother asked Bala if he would lock the door.