This sentence pattern is great when you want to express regret for something that you perhaps did not do.
当你想表达对一些过去没做成的事情感到后悔时，你可以使用这个句型。
Used to express regret or disapproval.
有些人第一次表露出悔恨。
There was no need for the writer to express regret, he though.
便条的作者不必表示遗憾了，上校这样想着。 纠正这个错误其实很容易。
And in case he wants to express regret, he will do it indirectly.
如果他真要表示悔意，他会间接地表示。
Express regret when you are not able to give the caller an appointment and try to schedule one on a future date.
当你不能为访者安排预约时表示歉意，并且尽量在将来的某个时间安排预约。
We wish to express our deep regret over the passing of your husband.
对你丈夫的不幸逝世我们深感痛惜。
悲痛的情感或表达；
I'm write to you to express my deep regret.
我写此信向你表示深深的歉意。
Able to apologize and express regret for situation, when appropriate.
适当时，能够为某种情况道歉或表示遗憾。
I write to you to express my deep regret.
我写此信向你表示深深的懊悔。
In the face of disaster, I to a national express my regret.
抱歉，关于翻成英语：在灾难面前，我对一个国家表现出我的惋惜。
In the face of disaster, I to a national express my regret.
抱歉，关于翻成英语：在灾难面前，我对一个国家表现出我的惋惜。
应用推荐