go back on one's word (go back on one's word)

Idiom Promise

含义

to not do what one said one would do

不做自己说过会做的事情 (bù zuò zìjǐ shuō guò huì zuò de shìqíng)

例句

"He went back on his word about helping me."

"他没有履行关于帮助我的承诺。" (Tā méiyǒu lǚxíng guānyú bāngzhù wǒ de chéngnuò.)