1. When you was at school we had done all your homework by that time.
2. We had decorated that room before the party.
3. My father had arrived to another country before the hurricane.
4. When she came to the room last week, we had already cleaned it.
5. When the flood occurred, the police had already evacuated all people in the town.
6. All buildings had already been ruined, when the emergency came into the disaster area.