Change into passive voice Why Benny helped Mary ini the office?

Change into passive voice Why Benny helped Mary ini the office?

 

Passive Voice: S + To Be + V3 Umumnya dibelakang passive voice ada preposisi seperti by. Tapi tidak semua. Why Marry was helped by Benny in the office? TO BE yang dimaksud dapat berupa is, are, am, was, were, be