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We are early.
我们是早的。
You are students.
你们是学生。
They are quiet.
他们是安静的。
be动词肯定的缩写形式如下图：
图片来源于网络
I am=I'm
You are=You're
He is=He's
She is=She's
It is=It's
We are=We're
You are=You're
They are=They're
用be动词的正确形式填空。
图片来源于网络
be动词的否定式为：主语 be动词 not 其他。如：
图片来源于网络
I am not sad.
我不伤心。
You aren't at home.
你不在家。
He isn't thirsty.
他不渴。
She isn't a pilot.
她不是飞行员。
It isn't small.
它不小。
