3 sentences for 约定 (yuē​dìng — agree)

1. 爷爷，我们怎么约定的呢？

   yé​ye, wǒ​men zěn​me yuē​dìng de ne?

   Grandpa, what was our deal?

   Source: OpenSubtitles

2. 我们约定在图书馆门口集合。

   wǒ​men yuē​dìng zài tú​shū​guǎn mén​kǒu jí​hé.

   We agreed to meet at the library entrance.

   Source: Dong Chinese Dictionary

3. 他们约定在黎明时分进行决斗。

   tā​men yuē​dìng zài lí​míng shí​fēn jìn​xíng jué​dòu.

   They agreed to have a duel at dawn.

   Source: Dong Chinese Dictionary