英语中的be动词是什么意思?

如题所述

be是英语动词中比较特殊的一类动词,其使用频率很高,牵涉到各种句型、时态和语态等用法,今天就跟大家分享一下be动词的各类用法。

系动词be作为系动词(也叫连系动词,link verb)的be,是英语学习者接触最早的用法,而且其用法也很多。其基本含义为“是”,基本用法结构为“主语+be+表语”,也就是常说的主系表结构,其中的表语一般都由名词、形容词、数词或表地点、时间等的短语来充当。

要看语句的时态:

如果是一般过去时,就用was/were

如果是一般现在时,就用am/is/are

如果是一般将来时,就用will be

如果是现在完成时,就用have/has been

如果是过去完成时,就用had been

以上内容参考:百度百科-be动词

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第1个回答  推荐于2018-05-09
在英语语法中,be动词意思和用法很多,一般的意思是:是,此种用法,有多种变化形式,is,am,are,was,were,being,been,to be.另外,be动词还有成为的意思。根据句子中不同的人称、数和时态,应该选择相应的be动词。
要看语句的时态:
如果是一般过去时,就用was/were
如果是一般现在时,就用am/is/are
如果是一般将来时,就用will be
然后看主语的人称及复数形式:

一般过去时:
第一人称和第三人称的单数形式,则用was
第一人称和第二人称、第三人称的复数,则用were
一般现在时:
第一人称单数形式,用am
第三人称单数形式,用is
第一人称复数、第二人称、第三人称的复数形式,则用are
一般将来时:
will be
口诀:一般时态有关be动词的口诀
我用am,你用are,is连着他她它,单数主语用is,复数主语全用are
用法
be (be/is/are/am/was/were)
[bi:]
vi
he is, we are, you are, they are (缩略式 I'm, you're, he's, we're, you're, they're), (否定缩略式 I'm not, isn't, aren't), 过去时 I was, you were, he was, we were, you were, they were (过去时否定缩略式 wasn't, weren't),过去分词been,现在分词being
英语的“be”是个特殊动词;有些语言,如马来文等,并没有“be”这样的动词。
“Be”除了原形的“be”之外,还有另外七种形式:am, is, are, been, being, was, were.
在句子中,“be”可以是主动词(The Principal Verb)或助动词(The Auxiliary Verb)

例句对照
【当做主动词时,“be”在性质上属于接系动词(The Linking Verb), 后面要有名词、形容词、地方副词或短语作补足语(The Complement)。】例如:
The man is a science teacher.
这个男子是一位科学教师。
Mary's new dresses are colourful.
玛丽的新衣服色彩鲜艳。
I havebeen there before.
我以前去过那里。
My motheris in the kitchen now.
我妈妈现在在厨房里。
★这四个都是陈述句,可以变成疑问句,方法简单,把主语和“be”或助动词对换位置即可:
Is the man a science teacher?
Are Mary's new dresses colourful?
Have I been there before?
Is mother in the kitchen now?
★当“be”要在祈使句中出现时,陈述句可借助助动词“do”,否定句必须在前加上助动词“don't”,如:
Don't be silly!
Do be obedient!
Be careful!
Don'tbe a fool!
★“Be”有两种缩写法,如下:
He's not...../He isn't....
You're not...../You aren't...
★但“am + not”的缩写法只有一个:
I'm not.
有人用“ain't”, 但这并不是标准英语。
谈过了“be”作主动词的功能
【1.】“Be + 现在分词”以组成进行式时态(Continuous Tenses),如:
Tony's maidis washing his new car.
The children are playing in the field.
Samuel was eating when I came in.
We have been living here since 1959.
【2.】“事/物人 +Be + 过去分词”以组成被动语态(The Passive Voice),如:
Her money in the drawer was stolen
A number of good jobs are taken up by foreigners
David studied in Taiwan but hasbeen trained as a language lecturer in America
Can all the wonderful birds be found in our Bird Park
The disobedient boywas told to stand out- side the classroom
Steps are being taken to reduce traffic con- gestion during peak hours
Dishonest students will be immediately dealt with本回答被网友采纳
第2个回答  2015-05-07
be 助词v.aux. 1.(与动词的现在分词连用,构成各种进行时态)正在...,在... I won't be free this afternoon. I'll be seeing a friend off. 我今天下午没空,我要给朋友送行。 What were you doing from 9 to 11 this morning? 今天上午九点到十一点你在做什么? He is working. 他在工作。 2.(与及物动词的过去分词连用,构成被动语态)被... The problem was solved long ago. 问题早解决了。 It will be discussed tomorrow. 此事将在明天讨论。 3.【旧】(与不及物动词go,come,rise等的过去分词连用,构成完成时)已经... The sun is set. 太阳已经下山。 4.(与动词不定式连用,表示职责、义务、意图、约定、可能性等)应该做...,必须做 ...;预定做...;会做... The President is to visit Japan next week. 总统将于下周访问日本。 You're to do your homework before you watch TV. 你应该做了功课再看电视。 不及物动词 vi. 1.是[L] At that time he was the chair of the department. 当时他是系主任。 I am a teacher and they are my students. 我是老师,他们是我的学生。 She is very young. 她非常年轻。 2.(表示时间、度、量、价值等)是;值;等于[L] The watch is 100 dollars. 这表值一百元。 3.(常用祈使语气或不定式)要,得;成为;变成[L] Be quiet, please. 请安静。 4.(与there连用)有[L] There are a lot of tourists there. 那里有许多观光客。 5.逗留,(继续)呆[L] He will be here all next week. 下周他将一直呆在这儿。 6.在[Q] Tony is in the office. 托尼在办公室里。 7.存在 Whatever is has every reason for being. 存在的东西总有其存在的理由。 8.听任 If she's sleeping, let her be. 如果她在睡觉,就别惊动她本回答被提问者采纳
第3个回答  2019-01-19
be动词的含义

1 是(表状态)

2, 在(表存在,位置)

主词+be动词

一般来说be动词要根据主词的人称来选择。(如下表)

be动词的否定

含be动词(am, is, are)的肯定句在be动词后面加not,即可变成否定句时。

格式:

肯定句:主词 + am/is/are +.......

否定句:主词 + am/is/are + not+.......

be动词可以跟not缩写在一起

is not =isn't

are not = aren't

be动词的疑问句

在谓语是be动词的句子中,将be动词移到主词前,句尾加问号,即可构成疑问句

格式:

肯定句:主词 + am/is/are +.......

疑问句:Am/Is/Are +主词 +.......?

be动词开头的一般疑问句,可用Yes或No回答,而答句中的主词需要用代名词(I she he they we 等)代替

格式:

肯定回答:Yes,主词 + am/are/is.

否定回答:No, 主词 + am/are/is + not

2be动词用法有哪些

be (be/is/are/am/was/were)

[bi:]

vi

he is, we are, you are, they are (缩略式 I'm, you're, he's, we're, you're, they're), (否定缩略式 I'm not, isn't, aren't), 过去时 I was, you were, he was, we were, you were, they were (过去时否定缩略式 wasn't, weren't),过去分词been,现在分词being

英语的“be”是个特殊动词;有些语言,如马来文等,并没有“be”这样的动词。

“Be”除了原形的“be”之外,还有另外七种形式:am, is, are, been, being, was, were.

在句子中,“be”可以是主动词(The Principal Verb)或助动词(The Auxiliary Verb)
第4个回答  2018-06-16
就是am,is,are
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