Помогите глагол to be в правильной форме!

1. I AM a pupil. 2. My father IS not a teacher, he IS a scientist. 3. IS your aunt a doctor? - Yes, she IS 4. ARE they at home? - No, they ARE not at home, they ARE at work. 5. My brother IS a worker. He IS at work. 6. ARE you an engineer? - Yes, I AM 7. IS your sister a typist? No, she IS not a typist, she IS .a student. 8.IS your brother at school? - Yes, he IS .9. IS your sister at school? - No, she IS not at school. 10. My ...sister IS at home. 11.ARE this your watch? Yes, it ARE 12. She .IS an actress. 13. This IS.my bag. 14. My uncle IS an office-worker. 15. He IS at work. 16. Helen .IS a painter. She has some fine pictures. They ARE on the walls. She has much paper. It IS on the shelf. The shelf ISbrown. It ISon the wall. Helen has a brother. He ISa student. He has a family. His family ISnot in St. Petersburg, it IS in Moscow.

1. I am a pupil. 2. My father is not a teacher, he is a scientist. 3. Is your aunt a doctor? - Yes, she is. 4. Are they at home? - No, they are not at home, they are at work. 5. My brother is a worker. He is at work. 6. Are you an engineer? - Yes, I am. 7. Is your sister a typist? No, she is not a typist, she is a student. 8. Is your brother at school? - Yes, he is. 9. Is your sister at school? - No, she is not at school. 10. My sister is at home. 11. Is this your watch? Yes, it is. 12. She is an actress. 13. This is my bag. 14. My uncle is an office-worker. 15. He is at work. 16. Helen is a painter. She has some fine pictures. They are on the walls. She has much paper. It is on the shelf. The shelf is brown. It is on the wall. Helen has a brother. He is a student. He has a family. His family is not in St. Petersburg, it is in Moscow.