1. Richard has written a good book.
2. Mary hasn't got up yet.
3. Walter and Pat have finished their projects.
4. The teacher hasn't come today.
5. Hector has broken his left arm.
6. The driver has stopped at the traffic lights.
7. Lucas has passed his last exams.
8. Katherine has met him before.
9. The girls have switched on the TV.
10. Alexander has had dinner with me.