1. It has been raining ever since morning.
2. lane has been talking on the phone for a whole hour.
3. Mr. Greene has been looking through papers since we came.
4. I have been writing a letter for half an hour.
5. Mother has been washing up since we finished dinner.
6. The students have been writing a test for an hour and a half.
7. You have been thinking about her for the last few days.
8. The children have been watching TV the whole day.