1. yes, I am./no, I am not.
2.yes, I am/ no, I am not.
3. I am a student/ I am a teacher.
4. yes, he is/ no, he is not.
5. yes he is/ no, he is not.
6. my friend is a doctor/ my friend is a teacher.
7. yes, I am/ no, I am not.
8. yes, I am/ no, I am not.
9. yes, I am/ no, I am not.
10. I am a teacher/ I am a doctor.
11. yes, he is/ no, he is not.
12. yes, they are/ no, they are not.
13. yes, we are/ no, we are not.
14. yes, he is/ no, he is not.
15. Nick is a doctor/ Jane is a doctor.
16. Nick is a good doctor/ Nick is a bad doctor.
17. Nick is a doctor/ Nick is a teacher.