在中文里，“我家有三口人”可以翻译成 “我的家里有三口人” 或者 “我家里有三个人”。

在英语里，可以表达为："There are three people in my family." 或者 "My family has three people."

这里的“family”一词来自拉丁语 "familia"，意思是“家庭、亲戚”。

例句：

There are three people in my family: my husband, my son, and me.

My family has three people: my parents, my sister, and me.

I come from a family of three: my mom, dad, and me.