Salut,
Present Perfect Continuous se referă la o acțiunea continuă, începută în trecut și care se continuă în prezentul acțiunii.
1. ... has not been
2. has been reading
3. I have been looking for the pen, ... but I have not found it.
4. have been running
5. has been sitting
6. have known
7. has been teaching
8. have been building that... but they have finished only half of it.
9. He has not come, yet, but his wife has already arrived.
10. has been standing
11. have not bought
12. have not played much chess..., I have been too busy.
13. have not been speaking
14. has been smoking
15. has been wasting
Green eyes.