Change into passive voice..... the guard opens the door. Share with your friends Share 0 Roshini Anie Thomas answered this The door is opened by the guard. 0 View Full Answer Niyati Gupta answered this the door was open by guard -2 Niyati Gupta answered this the door is opened by guard . cause open to past participle form 0 Haarika answered this Let the door be opened by the guard . 2