Find out correct auxiliary verb from below mentioned sentences:

1. I am a teacher.
2. He is my friend.
3. They are my relatives.
4. He was a school head master.
5. We were friends.
6. She will meet you tomorrow.
7. I shall go to office.
8. We would like to come with you.
9. I should meet them tomorrow.
10. I do my work.
11. He does his work.
12. What you did to your parents?
13. I can go there alone.
14. We could reach there on time.
15. He may come tomorrow.
16. She might change her mind.
17. You must come earlier.
18. You ought to/must drive carefully.
19. I have a car.
20. He has a nice bike.
21. She had urgent meeting in the office.
22. He does not need your help.
23. He dare not fight with me.
24. She used to quarrel with her neighbour.