be动词用法口诀6个例子（be动词的五种基本用法）

我(I)用am，例如:I am a boy.

你(you)用are，例如:You are a girl.

Is连着he，she，ⅰt，例如:He ⅰs a boy. She is a girl. It is a cat.

复数全部要用are，例如:They are my brother.