I am very regret of originally
希望采纳,谢谢啦~\(≧▽≦)/~
Regret就是这个词,若果一定要在前面加个定语“当初”的话,I regret at that time that·····
I have a great regret for what I did then.
I very much regret what I did then.
I very much regret doing so then.
I'm really regret that I.... before
i am very regret of originally