4 sentences

1. 我欠他一个大人情。

   wǒ qiàn tā yī gè dà rén​qíng.

   I owe him a huge favor.

   Source: Dong Chinese Dictionary

2. ‎你欠我一个人情！

   ‎ nǐ qiàn wǒ yī gè rén​qíng!

   You owe me one!

   Source: OpenSubtitles

3. 我欠你一个人情。

   wǒ qiàn nǐ yī gè rén​qíng.

   I owe you one.

   Source: OpenSubtitles

4. 他历经社会磨炼，已经深谙人情世故。

   tā lì​jīng shè​huì mó​liàn, yǐ​jīng shēn'ān rén​qíng shì​gù.

   Having gone through the trials of society, he is well-versed in the ways of the world.

   Source: Dong Chinese Dictionary