1. The city had been defended by the brave men.
2. The window had been broken by the little girl.
3. Had the problems been solved by Dorothy?
4. Five banks had been robbed by those prisoners.
5. The vase had just been knocked down when the earthquake happened.
6. Had verbs been studied before this class?
7. The tub had been cleaned before the sink.
8. Because a room had not been booked in advance, we were unable to find a hotel.