Вставьте глагол to be в форме present simple 1.he_a student.he_a good student. 2.his father_a doctor. 3.my mother_not a teacher. 4._your sister a pupil?-yes,she_. 5.they_at home now 6.this_my house 7._they at school?-no,they_not at school. 8._your father a pilot?-yes,he _. 9.nick_not a student.he_a pupil.he _at school now. 10.these men_drivers. 11.my friend_an engineer.he_at work. 12._your parents at home?-no,they _not. 13.i_a pupil,i_not a student. 14._this your book?-this book_not my.my book_in my bag. 15.michael has a brother.his brother_20.he _a student.he_at home now. 16.these _his newspapers. 17._there any books on your table?-yes,there_. 18.i_a doctor.i_a good doctor. 19._his friends_at school now?-no,they _ in the garden. 20._her sister a teacher?-yes,she_.

Вот правильные формы глагола to be (am, is, are) для каждого предложения:

1. He is a student. He is a good student.
2. His father is a doctor.
3. My mother is not a teacher.
4. Is your sister a pupil? — Yes, she is.
5. They are at home now.
6. This is my house.
7. Are they at school? — No, they are not at school.
8. Is your father a pilot? — Yes, he is.
9. Nick is not a student. He is a pupil. He is at school now.
10. These men are drivers.
11. My friend is an engineer. He is at work.
12. Are your parents at home? — No, they are not.
13. I am a pupil, I am not a student.
14. Is this your book? — This book is not mine. My book is in my bag.
15. Michael has a brother. His brother is 20. He is a student. He is at home now.
16. These are his newspapers.
17. Are there any books on your table? — Yes, there are.
18. I am a doctor. I am a good doctor.
19. Are his friends at school now? — No, they are in the garden.
20. Is her sister a teacher? — Yes, she is.

Краткая справка по формам:

• am — используется только с местоимением I (я).
• is — используется с существительными в единственном числе и местоимениями he, she, it (он, она, оно).
• are — используется с существительными во множественном числе и местоимениями we, you, they (мы, вы/ты, они).

Я могу также составить для вас таблицу с правилами отрицания и вопросительными формами этого глагола, если это потребуется.