1) It has been raining since morning.
2) Jane 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.