be动词的用法教学

Be 动词
今天给大家讲解的是be动词，你知道什么是be动词吗？它又有哪些形式呢？be动词的三种基本形式为：am， is， are。

be 动词的用法：一般来说be动词要根据主词的人称来选择。

（如下表）
温馨提示：
be动词前面的人称，是不可随意替换的。

例如：I am, You are, She is，并不会出现I is, You am, She are 这样的情形.
Be动词的用法口诀：
我(I)用am，你(you)用are， is连着他(he)，她(she)，它(it)；
单数名词用is，复数名词全用are；
变疑问，往前提，句末问号莫丢弃；
变否定，更容易， be后not莫忘记；
疑问否定任你变，句首大写莫迟疑。

练习一
一、用am, is, are 填空
1) I _____ a student.
2) You ____ a doctor.
3) ____she from Jinan?
4) _____ you American?
5) He _____ in Class 4, Grade 1.
6) It_____ a car.
7) They ____ cars
8) ____ your mother in China?
9) _____your friends in New York?
10) What ____her name?
11) These _____ buses.
12) Those _____oranges.
13) Where _____ her mother?
14) How old _____your teacher?
15) What class _____ you in?
二、模仿
Eg. That is a book.
否定句：That is not a book.
疑问句：Is that a book？
回答：Yes, it is. / No, it isn’t.
1.This is a coat.
否定句：
疑问句：
回答：
2.I am a student.
否定句：
疑问句：
回答：
3.You are a star.
否定句：
疑问句：
回答：
4.These are apples.
否定句：
疑问句：
回答：
三、在下面的短文中填上恰当be动词。

I ______ a girl. My name _______ Mary. I ______ in Class 2, Grade 7. I ______
12 years old. Here ______ my family photo. Look! These ______ my parents and those _______ my grandparents. This boy ______ my brother. He ________ 15 years old now. That ______ my cat, Mimi. It ______ very lovely.
练习二
一、在下面的题目中填上恰当的Be动词。

1. I ________from Australia.
2. She _______ a student.
3. Jane and Tom _________my friends.
4. My parents _______very busy every day。

5. I ______ a boy. ______ you a boy? No, I _____ not.
6. The girl______ Jack’s sister.
8. The dog _______ tall and fat.
9. The man with big eyes _______ a teacher.
10. ______ your brother in the classroom?
11. Where _____ your mother? She ______ at home.
12. How _______ your father?
13. Mike and Liu Tao ______ at school.
14. Whose dress ______ this?
15. Whose socks ______ they?
16. That ______ my red skirt.
17. Who ______ I?
18.The jeans ______ on the desk.
19. Here ______ some sweaters for you.
20. The black gloves ______ for Su Yang.
21. This pair of gloves ______ for Yang Ling.
22. Where____the bag? It ____ on the table.
Where ____the bags? They ____on the table.
23. Where _____your pen? It ____under the sofa.
Where_____your pens? They ____under the sofa.
24. Where _____her backpacks? They _____on the chair.
Where_____her backpack? It ____on the chair.
二、用BE动词的正确形式完成下列句子。

1.I _______________ a student. 6. You __________ students.
2.She _____________ a student. 7. We __________ students.
3.He ______________ a student. 8. You and I __________ students.
4.It _______________ a country. 9. They ________________ students.
5.You _____________ a student. 10. Jim and Tom __________ in America.
三、英语陈述句变一般疑问句和否定句，和一般疑问句回答。

1. I'm in Class five.
否定句：__________________
一般疑问句：________________
回答：________________
2. The man is a doctor.
否定句：_______________
一般疑问句：___________________
回答：____________________
3. They are my friends.
否定句：___________________
一般疑问句：________________________
回答：____________________
4. His shoes are black.
否定句: ___________________________
一般疑问句: __________________________
回答______________________。