1. He has been talking on the phone for 20 minutes.

2. I have been waiting for my friend for an hour.

3. It has been raining for 3 hours.

4. Bob has been sitting in the waiting room since morning.

5. I have been trying to learn Greek for 2 years.

6. He has been learning to drive for one month.

7. They have been quarrelling for 4 days.

8. The baby has been crying since morning.

9. I have been living in the centre since the start of the year.

10. He has been listening to his favorite music for 3 hours.

11. Jack has been doing nothing for 4 years.

12. The parents have been watching TV since 5 o’clock.

13. Father has been sleeping in his armchair for 45 minutes.

14. Jane has been walking with her dog since 11 o’clock.

15. The teacher has been correcting our papers for 5 hours.

16. My sister his been looking for a pair of new shoes for 5 hours.