3 sentences

1. 他许诺要做正确的事。

   tā xǔ​nuò yào zuò zhèng​què de shì.

   He promised to do the right thing.

   Source: CCMatrix

2. 他许诺不迟到。

   tā xǔ​nuò bù chí​dào.

   He promised not to be late.

   Source: CCMatrix

3. 他许诺给我试训，不是一份合同，但这就是我需要听到的全部。

   tā xǔ​nuò gěi wǒ shì​xùn, bù​shì yī​fèn hé​tong, dàn zhè jiù​shì wǒ xū​yào tīng dào de quán​bù.

   He promised me a tryout, not a contract, but that was all I needed to hear.

   Source: CCMatrix