介绍自己的句子可以说，I am ……我是。或者My name is…我的名字是。

介绍家人的句子可以说

This is my mother这是我的妈妈

That is my father.那是我的爸爸.

These are my parents.这是我的父母。

Those are my sisters.那些是我的姐妹。

These are my brothers.这些是我的兄弟。

Hello, my name is Li Yan. I'm twelve years old. I 'm in Class One, Grade Four. I study hard.There are three people in my family. My father is a teacher.He teaches math.We are in the same school. My mother is a nurse in the hospital.I love them. They love me , too.I have a happy family.