回/在 + 家 / Number + 家 + Noun
家 (jiā) means "home" or "family" and is one of the most fundamental nouns in Chinese. It can refer to a physical home, as in 回家 (to go home), or to family as a unit, as in 我的家 (my family). It also functions as a measure word for businesses and institutions, such as 一家公司 (a company).
下班后我想赶快回家。
Xiàbān hòu wǒ xiǎng gǎnkuài huíjiā.
After work, I want to hurry home.
我的家有五口人,大家关系都很好。
Wǒ de jiā yǒu wǔ kǒu rén, dàjiā guānxi dōu hěn hǎo.
My family has five members, and everyone gets along very well.
这条街上新开了一家咖啡店。
Zhè tiáo jiē shàng xīn kāi le yī jiā kāfēi diàn.
A new coffee shop just opened on this street.