必动词的用法

主语为第一人称是用am，第二人称单复数用are,第三人称单数用is，复数都用are.

还有哦
当名词前面的词是both,all,many用are
当名词前面是either,neither之类的用is

我用am 你用are is连着它他她

I am a teacher. We are teachers.
You are a student. You are students.(you 复数你们）
He is a student too. They are students.