你家有几口人的英文是How many people are there in your family。
例句:
1、波波, 你家有几口人?How many people are there in your family, Bo - Bo?
2、你家有几口人?How many members are there in your family?
3、说说你的家庭情况,你父亲是做什么的?你家有几口人?。
Say something about your family, what does your father do? How many people are there in your family?
4、你家有几口人?四口人。我的父母、姐姐和我。
How big is your family? There are four in my family: My parents, my sister and me.