3 sentences

1. 他已经有曾孙了。

   tā yǐ​jīng yǒu zēng sūn le.

   He already has a great-grandson.

   Source: Dong Chinese Dictionary

2. 爷爷在公园里带着小孙子玩耍。

   yé​ye zài gōng​yuán lǐ dài zhe xiǎo sūn zi wán​shuǎ.

   Grandpa is playing with his little grandson in the park.

   Source: Dong Chinese Dictionary

3. 孙先生是我们的老师。

   Sūn xiān​sheng shì wǒ​men de lǎo​shī.

   Mr. Sun is our teacher.

   Source: Dong Chinese Dictionary