1. She had been cleaning the house for an hour by the time her husband arrived.
2. When I became his neighbour, he had been living in that house all his life.
3. We have been fishing for two hours.
4. I will have been living here for ten years next year.
5. I have been working in this offoce for a month.
6. He felt tired because he had been playing football since lunchtime.
7. They will be tired when they arrive. They will have been travelling for 24 hours.
8. The kettle has been boiling for five minutes.
9. She has been trying to open the door for forty minutes.
10. I have been using this machine since last summer.
