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)