be true to your word

• vt. 说到做到(说话算话)

例句

用作及物动词 (vt.)

1. He said that he would be the equal of his word.
   他说他一定会说到做到。
2. He offered to help us and he didn't fall back.
   他主动提出帮助我们，并且说到做到。