Be动词的用法归纳
Be动词的用法归纳,你知道哪些?快来一起学习吧。下面我就和大家共享，来观赏一下吧。
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，帮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必需是及物动词)。
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)
个性特征自我描述
炼油怎么练>fm1主板 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，表示准备或将要做某事，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，表示按方案支配将要做某事。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 e. 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，由于它具有实际的词义，如成为;做;发生;进行;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. 江上寒
公务员总结 Jim has been in China for more than two years, but he has not yet been to Yichang.
As的用法——我们给的就是有用的
一、作副词，意为“相同地”，“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when，while都是引导时间状语从句的从属连词，含义都是当……的时候。但它们有区分:
(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……”。例如:
The girl dances as she sings on the stage.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 表示两个同步进展的动作或行为,译为“随着……”。例如:
As time went on / by, she became more and more worried. 随着时间的消逝，她变得越来越焦虑。
As he grew older, he became more intelligent. 随着他年龄的增长，他变得更有才智了。 癞蛤蟆养殖
③ 表示两个短促行为或大事几乎同时发生。例如:
I thought of it just as you opened your mouth. 恰好在你开口时，我想到了它。
点名册
Just as the flying worm hit her face, she gave a loud cry. 恰巧在飞虫撞到她脸上时，她大哭起来。
2. 引导缘由状语从句
as，becau，since都可以表示因果关系，连接缘由状语从句，含义是“由于，由于”，但它们有区分：becau表示的语气最强;as一般放在句首，语气较弱，较口语化;since经常用在书面语中，表示多为对方已知的、或稍加分析便可得知的缘由，有时可译作“既然”。例如： 宝宝发烧手脚发烫
I do it becau I like it. 我做这件事是由于我喜爱。
Since many of the customers work during the day, Billy has to collect the money at night. 由于很多顾客白天上班,所以毕利只好晚上去收钱。
As she has been ill perhaps shell need some help. 她由于生病可能需要些关心。
