Be 动词的用法：
(1) Am--was Is --was Are--were 口诀：我用am, 你用are, is用在他她它，复数全用are。
(2) 肯定和否定句 I am (not) from London. He is(not) a teacher. She is(not) in the dining room. My hair is(not) long. Her eyes are(not) small.
(3) 一般疑问句 Am I a Chinese? Yes, you are. No, you aren’t. Are they American? Yes, they are. No, they aren’t. Is the cat fat? Yes, it is. No, it isn’t.
用恰当的be动词填空。
1. I ______ a boy. ______ you a boy? No, I _____ not.
2. The girl______ Jack's sister.
3. The dog _______ tall and fat.
4. The man with big eyes _______ a teacher.
5. ______ your brother in the classroom?
6. Where _____ your mother? She ______ at home.
7. How _______ your father?
8. Mike and Liu Tao ______ at school.
9. Whose dress ______ this?
10. Whose socks ______ they?
11. That ______ my red skirt.
12. Who ______ I?
13.The jeans ______ on the desk.
14. Here ______ a scarf for you.
15. Here ______ some sweaters for you.
16. The black gloves ______ for Su Yang.
17. This pair of gloves ______ for Yang Ling.
18. The two cups of milk _____ for me.
19. Some tea ______ in the glass.
20. Gao shan's shirt _______ over there.
21. My sister's name ______Nancy.
22. This ______ not Wang Fang's pencil.
23. ______ David and Helen from England?
24. There ______ a girl in the room.
25. There ______ some apples on the tree.
26. _______ there any kites in the classroom?
27. _______ there any apple juice in the bottle?
28. There _______ some bread on the plate.
29. There _______ a boy, two girls, three men and ten women in the park.
30. You, he and I ______ from China.