1. be动词:am, is, are
2. 完整形式和缩略形式
I’m= I am(我是) you’re = you are(你是) he’s= he is(他是) she’s= she is(她是) it’s = it is(它是) they are= they’re(他们是)
what’s =what is(是什么) that’s= that is(那是)
3. 当询问你是不是某人时可以问:Are you…? 回答用:Yes, I am./No, I’m not.
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