Решение:
- I've known her since primary school. — an action which started in the past and has continued to the present
- We've already seen that film. — an action that took place some time in the past
- He's been reading for two hours. — the length of an action
- She has broken her arm. She has a cast. — the results of an action
- I have been going to that café for 20 years. — a repeated action
Ответ: 1 — action continued to present; 2 — action in the past; 3 — length of action; 4 — results of action; 5 — repeated action.