什么情况下用be动词

2024-12-15 00:50:29
推荐回答(2个)
回答1:

be动词的用法:

一、作实义动词用 

1、是,成为 如:

I am a Chinese.

我是中国人.

He wants to be a doctor.

他想成为医师.

2、有,存在 如:

There are seven days in a week.

一星期有七天.

To be or not to be----that is the question.

生存还是毁灭-----那就是问题所在.

二、系动词 

1、be +现在分词,构成进行时态,例如:

They are having a meeting.他们正在开会.

English is becoming more and more important.英语现在越来越重要.

2、be + 过去分词,构成被动语态,例如:

The window was broken by Tom..窗户是汤姆打碎的.

English is taught throughout the world.世界各地都教英语.

3、 be + 动词不定式,可表示下列内容:

a.表示最近、未来的计划或安排,例如:

He is to go to New York next week..他下周要去纽约.

We are to teach the freshpersons.我们要教新生.

说明:这种用法也可以说成是一种将来时态表达法.

b.表示命令,例如:

You are to explain this.对此你要做出解释.

He is to come to the office this afternoon.要他今天下午来办公室.

c.征求意见,例如:

How am I to answer him?我该怎样答复他?

Who is to go there?谁该去那儿呢?

d.表示相约、商定,例如:

We are to meet at the school gate at seven tomorrow morning.我们明天早晨7点在校门口集合.

扩展资料:

1、形式

有不同的be动词,基本上为:

am,is,are,was,were,been,being,be。

2、被动语态

被动语态的基本结构为be+done(Be动词+动词过去分词)

一般现在时:am/is/are+done

一般过去时:was/were+done

一般将来时:will+be+done

现在进行时:am/is/are+being+done

过去进行时:was/were+being+done

现在完成时:have/has+been+done

过去完成时:had+been+done



回答2:

看得出你对英语中的动词用法不是很了解.下面我来说一说:
英语中的动词有四类:连系动词(有be动词,感官动词等),实义(意)动词(行为动词),助动词和情态动词.
be动词的用法:
1.作实义动词用
1) 是,成为 如:
I am a Chinese.
我是中国人.
He wants to be a doctor.
他想成为医师.
2) 有,存在 如:
There are seven days in a week.
一星期有七天.
To be or not to be----that is the question.
生存还是毁灭-----那就是问题所在.
2.系动词
1) be +现在分词,构成进行时态,例如:
They are having a meeting.他们正在开会.
English is becoming more and more important.英语现在越来越重要.
2) be + 过去分词,构成被动语态,例如:
The window was broken by Tom..窗户是汤姆打碎的.
English is taught throughout the world.世界各地都教英语.
3) be + 动词不定式,可表示下列内容:
a.表示最近、未来的计划或安排,例如:
He is to go to New York next week..他下周要去纽约.
We are to teach the freshpersons.我们要教新生.
说明:这种用法也可以说成是一种将来时态表达法.
b.表示命令,例如:
You are to explain this.对此你要做出解释.
He is to come to the office this afternoon.要他今天下午来办公室.
c.征求意见,例如:
How am I to answer him?我该怎样答复他?
Who is to go there?谁该去那儿呢?
d.表示相约、商定,例如:
We are to meet at the school gate at seven tomorrow morning.我们明天早晨7点在校门口集合.