i am so sorry for what i've done.我为我所作的一切感到很抱歉.
i will do anything to make up for the mess i've brought.对我所带来的麻烦我会尽最大努力去弥补.
nothing can describe my feeling of regret right now.没有什么能表达我此刻懊悔的心情.
i do apologize to you for the troubles caused by my behaviour.我为我行为对你们所带来的麻烦表示郑重地歉意.