5 sentences

1. 我不是在啃指甲。

   wǒ bù​shì zài kěn zhǐ​jia.

   I'm not biting my nails.

   Source: OpenSubtitles

2. 你在啃指甲吗？

   nǐ zài kěn zhǐ​jia ma?

   Are you biting your nails?

   Source: OpenSubtitles

3. 这条狗整天一直在啃一块骨头。

   zhè tiáo gǒu zhěng​tiān yī​zhí zài kěn yī​kuài gū​tou.

   The dog has been gnawing away on the bone all day.

   Source: UM-Corpus: Education

4. 毛毛虫啃穿了一片很棒的绿树叶，之后他感觉好多了。

   máo​mao​chóng kěn chuān le yī​piàn hěn bàng de lǜ shù​yè, zhī​hòu tā gǎn​jué hǎo duō le.

   The caterpillar ate through one nice green leaf and after that he felt much better.

   Source: CCMatrix

5. 一只狗在咯吱咯吱地啃着骨头。

   yī zhī gǒu zài gē​zhī​gē​zhī de kěn zhe gǔ​tou.

   A dog was crunching on a bone.

   Source: UM-Corpus: Science