Section 2 : Structure

(Page 291)
Answer :

6. present

7. present

8. present
9. past
10. present
11. present
12. past
13. present
14. past
15. Cl1 = present ------------- Cl2 = present
16. Cl1 = past ----------------- Cl2 = past

17. present
18. present
19. past
20. present
21. present
22. past
23. present
24. past
25. present