- 1.
后悔，懊悔；对…痛惜；惋惜 -
• Afterwards he regretted having spoken to them about it. 后来他后悔向他们说起了这事。 -
• His death is regretted by all. 他的去世让所有人痛惜不已。 - 2. 不用进行式
正式 对…抱歉 -
• The management regrets any inconvenience caused to its customers. 管理部门为给顾客造成的不便致歉。 -
• We regret to inform you that your application has been unsuccessful. 我们很抱歉地通知你，你的申请没有通过。
用法说明
regret
后面既可以接动名词短语，也可接不定式短语。但regret doing和regret to do意思有别。试比较：
I regret telling you I crashed the car. 我后悔告诉你我把车撞坏了(已经告诉了)。
I regret to tell you this, but I have just crashed the car. 我很遗憾地告诉你，我把车撞坏了(即将告诉)。