请问一下英语第一、第二、第三人称单数复数都是怎么用的啊？希望能例题看看，谢谢！

我I用am，你you用are，is跟着she/he/it。是固定的用法
I am Lily.我是丽丽。
You are Lily.你是丽丽。
She/He/It is lily.她/他/它是丽丽。

我们/你们/他们都是用are，表示是复数。

第一人称：I / we
eg : I am very happy. / We are very bad.
I am a student.
We are students.
You are a student.
You are students.
第二人称：you / you
eg : You are clever. / You are foolish.
第三人称：he / she / they
eg : He / She is so handsome / pretty. / They are playing basketball.

第一人称：I / we
eg : I am very happy. / We are very bad.
第二人称：you / you
eg : You are clever. / You are foolish.
第三人称：he / she / they
eg : He / She is so handsome / pretty. / They are playing basketball.