break one's promise  打破约定

　　Well, it looks like they broke their promise. 恩，他们好像没有守信。

　　I will do my best not to break my promise. 我会尽量遵守我的承诺的。

　　Every now and then, we have to break the rules. 有些时候，我们不得不违反规则。

　　You're asking me to break the law. 你是在让我违法。

　　Forget about going to the party.  别想着去派对了。

　　I can't break my promise to my friends.  我不能打破和朋友们的约定啊。