3 sentences

1. 我曾许诺要保护他们。

   wǒ céng xǔ​nuò yào bǎo​hù tā​men.

   I promised to protect them.

   Source: OpenSubtitles

2. ‪他们向你许诺了什么？

   ‪ tā​men xiàng nǐ xǔ​nuò le shén​me?

   What did they promise you?

   Source: OpenSubtitles

3. 他向我许诺一定会准时回来。

   tā xiàng wǒ xǔ​nuò yī​dìng huì zhǔn​shí huí​lai.

   He promised me that he would definitely be back on time.

   Source: Dong Chinese Dictionary