1. John had finished the homeworks before we came
2. When I arrived yesterday, the lesson had already started for 20 minutes
3. What had you eaten before you went to school yesterday morning?
4. They haven't cleaned the house for many weeks
1.John finished his homework before we arrived
2.When I arrived yesterday, class had already started for 20 minutes
3.What did you eat before going to school last morning?
4.They haven't cleaned the room in weeks.