泰剧豆瓣:什么是be动词???

是指动词 be
其第一人称形式为 am
第二人称及复数形式为 are
第三人称单数形式为 is
原形式为 be

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...

am is are
I am
you are
they are
there are
these are
........
he is
she is
it is
that is
this is
.......

be动词分为3种形式,第一人称形式为 am 第二人称及复数形式为 are 第三人称单数形式为 is .
BE动词跟在主语后面,表示 ....是....如:I AM A BOY
(我是一个男孩)

否定形式在后面加 NOT

就是以be为原形的各种动词,除了am, is, are以外,还有were,was,been.

am is are