介绍:
be动词： am is are
人称代词(主格)：I You He She It
I (我) am……（我是……）
I am one.＝I'm one.
I am a student.＝I'm a student.
I am not……（我不是……）
I am not one.＝I'm not one.
I am not a student.＝I'm not a student.
You (你) are……（你是……）
You are two.＝You're two.
You are a boy.＝You're a boy.
You are not……（你不是……）
You are not two.＝You aren't two.
You are not a boy.＝You aren't a boy.
He (他) is……（他是……）
He is three.＝He's three.
He is a teacher.＝He's a teacher.
He is not……（他不是……）
He is not three.＝He isn't three.
He is not a teacher.＝He isn't a teacher.
She (她) is……（她是……）
She is four.＝She's four.
She is a doctor.＝She's a teacher.
She is not……（她不是……）
She is not four.＝She isn't four.
She is not a doctor.＝She isn't a doctor.
It (它) is……（它是……）
It is five.＝It's five.
It is a dog.＝It is a dog.
It is not……（它不是……）
It is not five.＝It isn't five.
It is not a dog.＝It isn't a dog.
我是am 你是are is前跟三个Ta
造句
1. 你不是一名医生。
2. 他是5岁。
3. 我是一名教师
填空（填入am/is/are）
1. I ___ not a good dancer.
2. She ___ six.
3. It ___ not a dog.
答案
1. You are not a doctor.（You aren't）
2. He is five.（He's）
3. I am a teacher.（I'm）
1. am
2. is
3. is
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