Be动词的用法归纳
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Be
动词的用法归纳
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Be
动词的用法归纳
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Be
动词的用法归纳
be
是一
个多功能动词,在初级英语里可见四种用法:
功能一,系动词
Be
be
为连
系动词,中心词义是
是
,句型为
主
+
系
+
表
结构。
be
的形式常用
am,
is, are(
现在式
);was, were(
过去
式
);will/can/may/must
be(
助动词
/
情态动词
+
原形
);have/has/had
been(
助动词
+
过去
分词
)
等。如:
To help animals
is helping people.(
一般现在时
)
The twins were
very busy yesterday.(
一般过去时
)
It will be
sunny tomorrow.(
一般将来时
)
She has been
ill for over a week.(
现在完成时
)
功能二,助动词
Be
助动词
be
,无词义,辅助主要动词一起在句中作谓语动词。
用法如下:
1. be+doing
:构成进行时态,有现在和过去两种进行时态。
如:
The girls is
reading and copying the new words now.
Young Tom was always asking
questions and trying out new
ideas.
2. be+done
:构成被动语态
(
主语是动作的承受者,
done
必
须是及物动词
)
。
如:
Tea is grown in my
hometown.(
一般现在时的被动语态
)
This building
was built three years
ago.(
一般过去时的被动语
态
)
Our classroom
has been cleaned and tidied already.(
现在
完成
时的被动语态
)
How could this kind of
cakes be made in your
home?(
含情态
动词的被动语态
)
That is a day
never to be
forgotten.(
动词不定式的被动语态
)
3. be+going to
do
,
表示
打
算或将要做某事
,
be
有现在和过
去两种形式。
如:
We are going to plant trees
in the park.
I
didnt know if she was going to come here.
4. be+to do
,表示
按计划安排将要做某事
< br>
。如:
The new shop is not to be
opened till next Monday.
One night an angel came to Mary and
told her that she was to
have this
special boy.
功能三,
There be
there
be
句式为:
there be+
主语
部分
+
状语部分,表示
某处
存在某物
,
be
常用现在时,过去时和将来时等。
如:
Oh, cool! And
there are many things to see. There is even a
deer park in Sanya.
There are about 80 pyramids
in Egypt.
Will
there be a football match in your school next
week?
功能四,实义
Be
可以将
be
视为实义动词,
因为它具有实际的词义,
如
成为
;
做
;
发生
;
举行
;
逗留
;
到达
等。
如:
His daughter wants to be a doctor for
animals in her twenties.
Kates birthday party will be at half
past six this evening.
Jim has been in China for more than two
years, but he has not
yet been to
Yichang.
As
的用法
——
我们给的就是实用的
一、作副词,意为
p>
“
相同地
”
,
p>
“
同样地
”
。例如
:
They don’t have as many airplanes.
他们没有同样多的飞机。
二、作连词,
1.
引导时间状语从句
as
与
wh
en
,
while
都是引导时间状语从
句的从属连词,
含义
都是
当
……
的时候
。但它们有区别
:
(1). when
作
“
当
……
的时候
”
解,
可以指较短的
(
一点
)
时间
,
也可
指一段时间。
从句的动作可以与主句的动作同时发生,
也可以先
于主句的动作发生。例如
:
John was having
his dinner when I saw him.
当我看到约翰的
时候,他正在吃饭。
She can write
only when the baby is asleep.
只有婴儿睡着的
时候,她才能写作。
(2). while
常表示一段较长的时间或一个过程,
强调主句谓语
动词与从句谓语动词同时发生或在从句动作过程中发生。例如
:
We must strike
while the iron is hot.
要趁热打铁。
While we were reading, the
teacher came in.
我们正在读书
的时候,老师走了进来。
(3).
但属下列情形时,只用
as,
而不用
when
或
while
。
①
用于表示同一个人的两种动作交替进行
,
指
“
一边
……,
一
边
……”
< br>。例如
:
The girl dances as she sings on the sta
ge.
那个女孩在舞台边唱
歌边跳舞。
He looked
behind from time to time as he went forward.
当他
朝前走时,不时地向后看。
②
表示
两个同步发展的动作或行为
,
译为
“<
/p>
随着
……”
。例如
: