Evidence of Recent Activity & Emotional emphasis
Advanced usage:
ā¢ Visible Evidence: "You're wet! Have you been swimming?" (Action finished or just finished, result is the focus).
ā¢ Emotional Duration: "I've been waiting for ages!" (Emphasis on the length/annoyance).
ā¢ Repeated Actions: "I've been phoning her all day." (Repeated, not continuous, but forms a "continuous" block of time).