5 sentences

1. 你知道他是多么顽固。

   nǐ zhī​dao tā shì duō​me wán​gù.

   You know how stubborn he is.

   Source: CCMatrix

2. 我父亲的思想非常顽固。

   wǒ fù​qīn de sī​xiǎng fēi​cháng wán​gù.

   My father is very rigid in his thinking.

   Source: AI Challenger 2017

3. 你变得这么顽固！

   nǐ biàn​de zhè​me wán​gù!

   You have become so stubborn!

   Source: AI Challenger 2017

4. 你是这个星球上最顽固的女人。

   nǐ shì zhè​ge xīng​qiú shang zuì wán​gù de nǚ​rén.

   You're the most stubborn woman on the planet.

   Source: CCMatrix

5. 他的孩子们告诉我，他非常顽固，是一个真正的“斗士”。

   tā de hái​zi​men gào​sù wǒ, tā fēi​cháng wán​gù, shì yī​ge zhēn​zhèng de“ dòu​shì”.

   His children told me that he was very stubborn and was a true “fighter.”

   Source: CCMatrix