be动词，意思和用法很多，根据句子中不同的人称、数和时间，型态，应该选择相应的be动词。下面小编告诉你英语be动词的形式和用法，大家一起来看看吧!
英语be动词的形式和用法:
现在时 I am, you are, 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
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。
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。
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。
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。
c. 征求意见，例如:
How am I to answer him? 我该怎样答复他?
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。
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现在进行时:
构成:主语+be+动词ing〔现在分词〕形式
第一人称+am+v-ing
第二人称+are+v-ing
第三人称+is+v-ing
定义:现在进行时表示现在或当前一般时间正在进行的动作。可以表示有计划的未来。也是一般现在时表将来。
现在进行时的基本用法:
a. 表示现在( 指说话人说话时) 正在发生的事情。 We are waiting for you.
b. 习惯进行:表示长期的或重复性的动作，说话时动作未必正在进行。
Mr. Green is writing another novel. (说话时并未在写，只处于写作的状态。) She is learning piano under Mr. Smith.
c.已经确定或安排好的将来活动
I'm leaving for a trek in Nepal next week.(已经安排了)
we're flying to Paris tomorrow.(票已经拿到了)
d.有些动词(状态动词不用于进行时态)
1.表示知道或了解的动词:believe,doubt,forget,imagine,know, remember,realize,suppose,understand
2.表示“看起来”“看上去"appear,resemble,seem
3表示喜爱或不喜爱hate,
4表示构成或来源的动词 be come ,include
5表示感官的动词 hear see smell sound taste
6表示拥有的动词belong . wish
there be…的否定式和疑问式:
■there be句式否定式的用法
there be句式的否定式通常应将否定词置于动词be之后:
There is not any bread left. 没有一点面包了。
There isn’t anything I can do for you. 我帮不了你什么忙。
若谓语中包括有助动词或情态动词，通常将否定词置于助动词与情态动词之后:
There can’t be so many mistakes. 不可能有那么多错误。
There shouldn’t be any doubt about it. 对此不应有什么怀疑。
There haven’t been any parties in weeks. 好几个礼拜没开过晚会了。
另外注意以下类型的否定式:
There doesn’t seem to have been any difficulty over the money question. 在钱的问题上似乎没发生什么困难。
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■there be句式疑问式的用法
there be句式的疑问式通常应将否定词置于动词be之后:
Is there any good film on? 映什么好电影吗?
Is there room for me in the car? 车子里还有我坐的地方吗?
Are there any letters for me? 有我的信吗?
若谓语中包括有助动词或情态动词，通常将助动词或情态动词移至句首构成疑问式:
Has there been an accident? 出事了吗?
Have there been any new developments? 有什么新的发展吗?
Can there have been so much rain there?那儿会下过那么多雨吗?
另外注意以下类型的疑问式:
Uncle Jesse, why do there have to be poor people like those? 杰西叔，为什么一定要有他们那样的穷人?
there be句式用于被动式:
■有通常情况下，there be句式中的 be表示“存在”。如:
There are numerous islands off the coast. 海岸边有许多岛屿。
There was a bed and a big wardrobe. 有一张床和一个大衣橱。
There was a rainbow in the sky. 天上有一道彩虹。
If there is any problem, let me know. 如果有什么问题可以通知我。
There is only one person I could approach. 只有一个人我可以去找。
There are in China over fifty minorities besides the Han nationality. 在中国除了汉族还有五十多个少数民族。
There is a lack of communication between the young and the old. 年轻人和老人之间沟通不足。
■但是，有时there be结构还可用被动式，这时be即变成了助动词，如:
There are now published thousands and millions of books every year. 现在每年出版上亿册书。
On the following day, there was held a splendid banquet. 第二天举行了盛大的宴会。
there be的非限定形式:
there be的非限定形式是there to be和there being，主要用来做介词或动词的宾语、主语或状语。如:
Have you ever thought of there being so many interesting films for you to choose from?没想到过有这么多有趣的电影供你选择吧?
John was relying on there being another opportunity. 约翰相信另有机会。
There being a bus stop so near my house is a great advantage. 有公交车停在离我房子这么近的地方是很大的优势。
There having been no rain, the ground was dry. 由于没有下雨，地上很干燥。
It’s unusual for there to be so few people in the street. (=It’s unusual that there are so few people in the street) 这条街上这么少的人是不寻常的。
It was too late for there to be any subways. 太晚了，不会有地铁了。
Would you like there to be a meeting to discuss the problem? 你们要开个会讨论一下这个问题吗?
I don’t want there to be a simple mistake in the article that I have written. 我不想我写的这篇文章中有错误。
I except there to be no argument about this. 我期限望对此事没有争论的。
注:there to be常做like, expect, mean, want, intend, prefer, hate等的复合宾语。
