11. We've not had breakfast yet.
12. They're still drinking tea in the dining room.
13. I've already done my homework.
14. He's still doing his homework.
15. We've had three lessons today.
16. They've just had a meeting.
17. She's not read that book yet.
18. She's still reading.
19. Who has written that?
20. What have you written to him?
21. I've just been at the dentist and I feel much better.
22. He's telling lies. He's not done his homework.
23. Why is he not having lunch? — She's still talking on the phone with his friend.
24. Where's that lazy cat gone? — She's over there, sleeping in front of the fireplace.
