Be 动词的用法：
(1) Am--was Is --was Are--were 口诀：我用am, 你用are, is用在他她它，复数全用are。
(2) 肯定和否定句
I am (not) from London.
He is(not) a teacher.
She is(not) in the dining room.
My hair is(not) long.
Her eyes are(not) small.
(3) 一般疑问句
Am I a Chinese? Yes, you are. No, you aren’t.
Are they American? Yes, they are. No, they aren’t.
Is the cat fat? Yes, it is. No, it isn’t.

Be 动词的用法：
(1) Am--was Is --was Are--were 口诀：我用am, 你用are, is用在他她它，复数全用are。
(2) 肯定和否定句
I am (not) from London.
He is(not) a teacher.
She is(not) in the dining room.
My hair is(not) long.
Her eyes are(not) small.
(3) 一般疑问句
Am I a Chinese? Yes, you are. No, you aren’t.
Are they American? Yes, they are. No, they aren’t.
Is the cat fat? Yes, it is. No, it isn’t.