1 By the time we had arrived, our friends had done all the job.
2 The Robinsons had driven home by bed time.
3 The teenagers had washed their bikes by the time their class began.
4 At 3 o'clock yesterday Kelly was doing her shopping.
5 When we returned, they had disappeared.
6 Willy had had lunch when I came into the dining room.
7 I knew everything before she called me.
8 The soup was tasteless and Jack had already eaten it when Rose ran into the kitchen.