Be 动词，表示一个状态正在进行。类似于汉语中的 ‘是’。
I am a doctor.
He is sleepy.
We are here.
I am not a doctor.
He is not sleepy.
We are not there.
Am I a doctor?
Is he sleepy?
Are we there?
Be 动词助记表格
| 肯定 | 否定 | 疑问 |
|---|---|---|
| I am | I am not | Am I? |
| You are | You are not (aren't) | Are you? |
| He is | He is not (isn't) | Is he? |
| She is | She is not (isn't) | Is she? |
| It is | It is not (isn't) | Is it? |
| We are | We are not (aren't) | Are we? |
| You are | You are not (aren't) | Are you? |
| They are | They are not (aren't) | Are they? |
