我家里有三个人，他们是我妈妈，我爸爸和我。

I've got three individuals, they are my mother, my father and me.

youdao

我有一个幸福的家庭，在我家，有三个人，我的爸爸，我的妈妈和我。

I have a happy family, there are three people in my family, my father, my mother and I.

youdao

我家有三个人：我的爸爸、我的妈妈和我。

There are three people in my family. They are my father, my mother and I.

youdao