一个人的名字作主语属于第三人称单数作主语。后面的系动词be 的形式,依据时态而定。如:一般现在时用is,一般过去时用was,一般将来时用will be.现在完成时用has been。
如:
WangMing  is reading a magazine.
例:WangMing   will be taking a walk in the park at this time tomorrow morning.
例:WangMing  has been teaching English in our school for years.
一、主语为第一人称单数 I (我)时,be动词用 am
I am a student.
I'm ten years old.
I'm a boy.
I am 可以缩写成 I'm
二、主语为第二人称 You(你),其他人称复数(we我们、you你们、they他们,她们,它们)或名词复数(两个以上的人或物)时,be动词用 are
You are beautiful. 第二人称单数
You are a good person. 第二人称单数
Are you a boy? 第二人称单数
We are in Class Five, Grade Seven. 其他人称复数
They are my friends. 其他人称复数
Tom and Lily are good friends. 两个、两个以上人或物
are与主语可以缩写,如:
We are = We're
They are = They're
You are = You're
三、主语为第三人称(he,she,it)、名词单数、不可数名词,be动词用 is
句型解析:
My mother is a teacher. 第三人称
He is a student. 第三人称
She is a good girl. 第三人称
The dog is tall and fat. 第三人称
That is my white shirt 名词单数
Some tea is in the glass. 不可数名词