Turn from active into passive you can't use cameras inside the gallery. have they sent the invitations? mr roberts drove the kids to school. they had tidied their room by 7 o'clock. someone left the window open. you ought to send the email now. tim didn't break the mirror.

Cameras can't be used inside the gallery.
Have the invitations been sent (by them)?
The kids were driven to school by Mr Roberts.
Their room had been tidied by 7 o'clock.
The window was left open.
The email ought to be sent now.
The mirror wasn't broken by Tim.