3 sentences for 死板 (sǐ​bǎn — inflexible)

1. 他这个人做事太死板，不知道变通。

   tā zhè gè rén zuò​shì tài sǐ​bǎn, bù zhī​dào biàn​tōng.

   He is too rigid in his ways and doesn't know how to adapt.

   Source: Dong Chinese Dictionary

2. 他的脑筋比较死板，不容易接受新事物。

   tā de nǎo​jīn bǐ​jiào sǐ​bǎn, bù róng​yì jiē​shòu xīn shì​wù.

   He is rather rigid in his thinking and doesn't easily accept new things.

   Source: Dong Chinese Dictionary

3. 你这人怎么这么死板，非要跟我杠到底吗？

   nǐ zhè rén zěn​me zhè​me sǐ​bǎn, fēi yào gēn wǒ gàng dào​dǐ ma?

   Why are you so stubborn? Do you have to argue with me to the end?

   Source: Dong Chinese Dictionary