系动词be的用法

一．系动词b e的同法Be有am,is,are

我(I)用am 你(you)用are is连着他(he)她(she)它(it)

我们(we)你们(you)他们(they)要用are

单数名词和不可数名词用is 复数形式要用are

变否定真容易be后not为标记

变问句be提前，句尾问号要配全（？）

应用时多注意缩写形式要牢记：

I'm=I am you're=you are he's=he is she's=she is it's=it is

we're=we are you're=you are they're=they are ... ...

二．There be句型

1.构成：There be ...句型表示的是“某处有(存在)某人或某物”，其结构为There be(is，are，was, were )+名词+地点状语。例如：

There are fifty-two students in our class.

There is a pencil in my pencil-case.

There was an old house by the river five years ago

2 注意事项

There be句型中be动词的形式要和其后的主语在人称和数上保持一致。

如果句子的主语是单数的可数名词，或是不可数名词，be动词用“is”“was”。例如：There is a basketball in the box.

There is a little milk in the glass.

如果句子的主语是复数名词，be动词就用“are”“were”。例如：

There are many birds in the tree.

There were many people in the street yesterday.

如果有两个或两个以上的名词作主语，be动词要和最靠近它的那个主语在数上保持一致，也就是我们常说的“就近原则”。例如：

There is an orange and some bananas in the basket.

There are some bananas and an orange in the basket.

练习题

（Be动词）

一、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.

二、在下面的题目中填上恰当的Be动词。（注意Be动词的时态）

1. I ________from Australia.

2. She _______ a student.

3. Jane and Tom _________my friends.

4. My parents _______very busy every day.

5. _______ there a Chinese school in New York?

6. There _____ some glasses on it.

7. There ________many monkeys in the mountain.

8. There_________ a beautiful garden in our school.

9. I _______ at school just now.

10. He ________ at the camp last week.

11. We ________ students two years ago.

12. They ________ on the farm a moment ago.

13. Yang Ling ________ eleven years old last year.

14. There ________ an apple on the plate yesterday.

15. There ________ some milk in the fridge on Sunday.

16. The mobile phone _______ on the sofa yesterday evening.

17. There _________some water in the glass.

18. There __________ some bread on the table.

19. Where ________ your friends yesterday?

20. How old __________ you last year?

21. Which dog ________ yours?

22. Ten and two ________ twelve.、

二、句型转换：

1. They are doing housework .(分别改成一般疑问句和否定句)

____________________________________________________________

____________________________________________________________ 2．The students are cleaning the classroom . ( 改一般疑问句并作肯定和否定回答) ____________________________________________________________

____________________________________________________________

3.Tom is under the tree.（变为否定句）

4.The mouse’s teeth are sharp.（变一般疑问句并作肯定回答）

5.The skateboards are black.(改成否定句)