Who is knocking at the door?change into passive voice Share with your friends Share 4 Tanvi Goel answered this Dear Student Passive voice- By whom is the door being knocked? Regards 19 View Full Answer Abdullah Akhtar answered this The door is knocked by whom -2 Piyush Tiwari answered this the door is knocked by whom 3 Avik Mandal answered this Passive Voice - The door is knocked by whom .Experts pls like . 2 Mayank Raj answered this 9iiiin -3