sent Perfect Continuousround is wet. It (rain).В. Объясните употребление Present Perfect

Sent Perfect Continuous
round is wet. It (rain).
В. Растолкуйте употребление Present Perfect либо Present Pe
в данных примерах.
1. Where is your camera? I don't know, I (lose) it
2. It isn't raining any more but the ground is wet. 1:
3. Is Nick here? No, he (go out).
4. John is very tired. He (work) hard.
5. Alice isn't at home. She (go) to France.
6. (You, ever, be) to Canada?
7. It (rain) about two hours.
8. I (just, have) dinner.
9. How long (you, read) this novel?
10. How many people (they, invite) to the party?
11. 1 (not, wait) for him long.
12. Carol (always, live) in London.
13. She (be) in hospital since Tuesday,
14. It's the first time Pete (drive) a car. He (never, drive) a car
before.
15. I (do) the same job for many years.
16. It's the most interesting film I (ever, see).
17. How many pages of that book (you, read)?
18. Why are your hands dirty? What (you, do)? (You, paint) the
fence?
19. I (not, eat) much today.
20. She (play) tennis since she was ten.