在英语中，我家有四个人可以用"There are four people in my family"来表达。这个短语的来源可能源自人们经常用"There is/are + 数字 + 名词"的句型来表达家庭人数。

例句：

"There are four people in my family" (我家有四个人)

"There are six people in their family" (他们家有六个人)

"There is one person in my family" (我家只有一个人)

"There are two people in their family" (他们家有两个人)