1.Why are you late?
2.When will you come?
3. When did you come?
4. When do you come?
5. When have you come?
6. Where are you now?
7.  Where were you?
8. How do you study?
9. How did you study?
10. How will you study?
11. How are you studying?
12. How were you studying?
13. Which is your favourite subject?
14. Which was your favourite subject?
15. How do you tackle this matter?
16. How did you tackle this matter?
17. What is your aim?
18. How do you go there?
19. How did you go there?
20. How will you go there?
21. Which subject do you like?
22. Why should I tell a lie?
23. Why you troubling me?
24. Who is he?
25. What is he?