神啊！！！哪位大大能告诉我be动词是什么？？？

.......有感而发，真的不懂，虽然我已经高中毕业了

be
[bi:; bi]
vi.
(现在式am, are, is; 过去式was, were; 过去分词been; 现在分词being)
是
[表示时间, 度量, 价值等]是; 值; 等于
[常用命令语气或不定式]做, 成为
在; 存在; 有; 生存
逗留, 持续
到达, 来到
发生, 产生
They are college students.
他们是大学生。
This spade is five yuan.
这把铲子售价五元。 Bequick!快点!
He is no more.
他已死了。
It was not to be.
不应有此事。
He'll be at his uncle's till next Friday.
他要在他舅舅家呆到下星期五。
Have you been to London?
你到过伦敦吗?
The doctor has been to see the patient.
医生来[去]看过病人了。

be
v.aux.
[与动词的现在分词连用, 构成各种进行时态]
[与及物动词的过去分词连用, 构成被动语态]
[与动词不定式连用, 表示职责、义务、意图、约定、可能性等]
[与不及物动词come, go等的过去分词连用, 构成完成体]
[用be和were表示虚拟语气]
She is singing.
她在唱歌。
The bridge was built in 1982.
这桥建于1982年。
I am to visit Mr. Green tomorrow.
我明天要去拜访格林先生。
He is gone. [He has gone.]
他已经走了。
If I were you, ...
假如我是你的话...

be 　　[bi:] 　　vi 　　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 　　英语的“be”是个特别动词；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.

is are am was were

am are is be 4个 看人称或时态变化如 you are not alone 里的are

就是is,am,are

就是is,am和are。在不同的语境和主语中要用相应的be动词。

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