以下是一些承諾的英文金句：
1. "I promise to do my best."
2. "I commit to achieving my goal."
3. "I swear to do what is right."
4. "I vow to be responsible for my actions."
5. "I promise to be loyal and trustworthy."
6. "I commit myself to being kind and compassionate."
7. "I swear to do what is in the best interest of others."
8. "I promise to always put honesty and integrity first."
9. "I commit to being there for you in good times and bad."
10. "I vow to be a loyal friend and supporter."
請注意，這些句子僅供參考，您可能需要根據自己的具體情況和情境進行調整。