Răspuns:
2)have been waiting for Sam to arrive since 7.00 pm
3)are tired because they have been walking for six hours
4)have been watching tv since 9 o'clock this morning
5)has been raining for a week
6)has been feeling sick since lunchtime today
7)have been building our own house for six months
8)has been traveling since the 28th of June
