3 sentences

1. 马夫正在马厩里给马刷毛。

   mǎ​fū zhèng​zài mǎ​jiù lǐ gěi mǎ shuā máo.

   The groom is brushing the horse in the stable.

   Source: Dong Chinese Dictionary

2. 赶车的马夫挥动手中的鞭，催促马儿快点跑。

   gǎn​chē de mǎ​fū huī​dòng shǒu zhōng de biān, cuī​cù mǎ r kuài diǎn pǎo.

   The coachman brandished his whip, urging the horse to run faster.

   Source: Dong Chinese Dictionary

3. 他因为长期充当马夫而被警方逮捕。

   tā yīn​wèi cháng​qī chōng​dāng mǎ​fū ér bèi jǐng​fāng dài​bǔ.

   He was arrested by the police for acting as a pimp for a long time.

   Source: Dong Chinese Dictionary