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1. Walter have been working since early morning.
2. Peter has been bothering me for three days.
3. Lis have been crying. Her eyes are red and puffy.
4. John has been skiing for an hour yesterday.
5. They has been climbing the mountain since morning.
6. We have been discussing this problem tree days ago.
7. Our friends has been solving this problem for a year.
8. Carol has been working for this film for twenty years.
9. The Prime Minister has been speaking in this TV programme for an hour.
10. The host of this programme have been entertaining the spectator for an hour.