1. The issue was being discussed from 5 to 6 o'clock.
2. A new music school was being built in our community when I came back after the army service.
3. The emails were being checked from 9 to 10.
4. He was sitting in a cafe, when I saw him.
5. I have been doing exercises for an hour.
6. I had done the exercises before you came.
7. I have to do everything myself.
8. My schoolbag is bigger than yours.