5 sentences

1. 这块肉太艮了，嚼不动。

   zhèi kuài ròu tài gěn le, jiáo bù dòng.

   This meat is too tough to chew.

   Source: Dong Chinese Dictionary

2. 他在嚼口香糖。

   tā zài jiáo kǒu​xiāng​táng.

   He is chewing gum.

   Source: Dong Chinese Dictionary

3. 这些豆角太老了，里面的筋都嚼不动。

   zhè​xiē dòu​jiǎo tài lǎo le, lǐ​miàn de jīn dōu jiáo bù dòng.

   These green beans are too old; the fibers inside are too tough to chew.

   Source: Dong Chinese Dictionary

4. 这块牛肉太老了，他嚼了半天还是吞不下去。

   zhè kuài niú​ròu tài lǎo le, tā jiáo le bàn​tiān hái​shi tūn bù xià​qù.

   This beef was too tough; he chewed for a long time but still couldn't swallow it.

   Source: Dong Chinese Dictionary

5. 这种青橄榄嚼起来虽然有些苦涩，但回味很甘甜。

   zhè zhǒng qīng gǎn​lǎn jiáo qi​lai suī​rán yǒu​xiē kǔ​sè, dàn huí​wèi hěn gān​tián.

   Although these green olives are a bit bitter to chew, they leave a sweet aftertaste.

   Source: Dong Chinese Dictionary