时态:谓语动词根据时间的不同发生变化

主系表

一般现在时态

I = am,

主语单数=is,

You和主语复数=are.

 

人称代词主格作主语

I = am:I am Tom.

她,他,它 = is:She is Lili

其他 = are:They are tercher.

 

名词作主语

单数is:Tom is a tercher.

复数are:Tom and me are tercher.

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一般现在时态变否定,疑问句

否定句:be + not

I'm not tercher.

She's not tercher.

They're not doctor.

 

疑问句:be移到句首

Are you English tercher?

Is it dog?

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