以下是一些可以用来介绍家人的英语短句：
She's my sister.
He's my younger brother.
They're my parents.
I have a younger sister/younger brother/sister/brother.
She's my grandmother/grandfather.
They're my aunts and uncles.
That's my big brother/big sister.
She's my little sister/little brother.
They're my cousins.
He's my nephew/niece.
