Definition: used to say that you are sorry that you have to tell someone about a situation Level: B2
我们很遗憾地通知您，您的请求已被拒绝。
We ___regret to inform you that your request has been denied.
她遗憾地表示她无法参加会议。
She ___regrets that she cannot attend the meeting.
我很遗憾地告诉您，活动已取消。
I ___regret to tell you that the event has been canceled.
