Meaning of yǐ qián:
yǐ qián
以前
Adverb
before; formerly; previous; ago
Wǒmen yǐqián chángcháng yīqǐ qù gōngyuán.
我们以前常常一起去公园。
We used to go to the park together before.
Wǒ yǐqián zhù zài Běijīng.
我以前住在北京。
I used to live in Beijing.
Yǐqián wǒ chángcháng qù gōngyuán sànbù.
以前我常常去公园散步。
I often used to go for walks in the park.
Wǒ hěn jiǔ yǐqián zhù zài Shànghǎi.
我很久以前住在上海。
I lived in Shanghai a long time ago.