It was a thoughtless remark and I regretted it immediately.

这是一句欠考虑的话，我马上就后悔了。

《柯林斯英汉双解大词典》

I regretted doing such a silly thing.

我后悔做了这样愚蠢的事。

youdao

Sometimes, I regretted choosing a best friend who was so pretty.

有时，我后悔选了这么漂亮的一个人做我最好的朋友。

youdao

Occasionally I allowed myself to get distracted and deviate from this rule, and in every instance I regretted it.

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The really bad decisions that I later regretted, and that caused me pain and suffering, have a number of core commonalities as well.

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' I did, and I never regretted it.

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