七年级be动词学案

be动词知识梳理及配套练习

1.be的各种形式

人称		形式
		现在式	过去式	现在分词	过去分词
第一人称	单数	am	was	being	done
	复数	are	were
第二人称	单数	are	were
	复数	are	were
第三人称	单数	is	was
	复数	are	were

2.be动词做连系动词（系动词）

（1）其基本含义为“是”，基本结构为“主语+be+表语”，也就是我们常说的主系表结构

（2）系动词be有各种时态和人称的变化

     例：I am a teacher now.  My friends were very angry then.

3.be动词做助动词

（1）be+现在分词构成进行时态

     He is talking to my mother.   

Jenny was reading at this time yesterday.

They will be arriving in Beijing tomorrow.

（2）be+及物动词的过去分词构成被动语态

     The window was broken last night. 

Thousands of trees are planted every year .

Your watch has already beenrepaired.

4.含有be动词的句子的句型变换

（1）否定句：在be之后直接加not

   There are some apples. ------ There aren’t any apples.

(is not=isn’t, are not=aren’t, was not=wasn’t, were not=weren’t，am not无缩写)

（2）疑问句：将be动词放到主语前

   There are some apples. ------ Are there any apples?

5.特殊句型中的be动词

（1）there be句型：

be可以与there一起构成there be句型，用来表示”存在”,往往翻译为“有”，

此时be的选择要看其之后的名词。

There is a white ruler on the desk.

There were a great many people in the car race last year.

（2）祈使句：

句子一般以Be开头或是Don't be开头，表示命令或建议等。

Be patient! （耐心一点！）

Don't be so hard on me! （不要对我这么严厉！）

（3）be going to:

 表示“打算或将要”,后加动词原型

He is going to visit us next week.

It is going to rain soon.