5 sentences

1. 那只松鼠正在树上啃松果。

   nà zhī sōng​shǔ zhèng​zài shù shàng kěn sōng​guǒ.

   That squirrel is gnawing on a pine cone in the tree.

   Source: Dong Chinese Dictionary

2. 这只狗正在啃一根大骨头。

   zhè zhī gǒu zhèng​zài kěn yī gēn dà gǔ​tou.

   The dog is gnawing on a big bone.

   Source: Dong Chinese Dictionary

3. 狗在角落里开心地啃一根骨头。

   gǒu zài jiǎo​luò lǐ kāi​xīn de kěn yī gēn gǔ​tou.

   The dog is happily gnawing on a bone in the corner.

   Source: Dong Chinese Dictionary

4. 别啃指甲。

   bié kěn zhǐ​jia.

   Don't bite your nails.

   Source: Dong Chinese Dictionary

5. 他已经连续三个晚上在啃那本深奥的物理书了。

   tā yǐ​jīng lián​xù sān gè wǎn​shang zài kěn nà běn shēn'ào de wù​lǐ shū le.

   He has been poring over that profound physics book for three consecutive nights.

   Source: Dong Chinese Dictionary