3 sentences

1. 无论你说什么，要诚恳。

   wú​lùn nǐ shuō shén​me, yào chéng​kěn.

   Whatever you say, be sincere.

   Source: CCMatrix

2. 这次，他听起来很诚恳。

   zhè​cì, tā tīng qi​lai hěn chéng​kěn.

   This time he sounded sincere.

   Source: CCMatrix

3. 他诚恳地请求她的原谅。

   tā chéng​kěn de qǐng​qiú tā de yuán​liàng.

   He sincerely asked for her forgiveness.

   Source: CCMatrix