n.承諾人；受約人

He ought to have kept his promise. 他原本應(yīng)該遵守自己的諾言。

I don't trust his promise to come for a visit. 我不相信他會如約前來訪問。

I promise I'll keep it down in the future. 我保證今后一定把音量放低。

Rarely did he fail to keep his promise. 他真的很難得失信。

He was oblivious of his promise. 他忘記了他的諾言。

He gave his solemn promise to do better. 他莊重地保證把事情辦好。