3 sentences

1. 一只蜻蜓停在荷叶上。

   yī zhī qīng​tíng tíng zài hé​yè shàng.

   A dragonfly landed on a lotus leaf.

   Source: Dong Chinese Dictionary

2. 天花板上有一只蜻蜓。

   tiān​huā​bǎn shàng yǒu yī zhī qīng​tíng.

   There is a dragonfly on the ceiling.

   Source: Tatoeba

3. 蜻蜓低飞，轻掠水面，泛起阵阵涟漪。

   qīng​tíng dī​fēi, qīng lüè shuǐ​miàn, fàn​qǐ zhèn zhèn lián​yī.

   Dragonflies fly low, skimming the surface of the water and creating ripples.

   Source: Dong Chinese Dictionary