He regretted missing the opportunity.

他为自己错过机会而感到遗憾。

She heartily regretted her mistake.

她对自己的错误感到非常后悔。

He regretted his past impulse spending.

他为过去的冲动消费感到后悔。

He horribly regretted his decision later.

他后来对自己的决定后悔不已。

I instantly regretted saying that out loud.

我一说出那句话就立刻后悔了。

He regretted losing his temper with his friend.

他对自己对朋友发脾气感到后悔。

She regretted her choice of major in university.

她对自己的大学专业选择感到后悔。

He ignored his instinct and regretted it later.

他忽略了直觉，后来感到后悔。

He regretted his decision after seeing the results.

在看到结果后，他后悔了他的决定。

She regretted wasting her youth on meaningless work.

她对自己的青春被无意义的工作消耗感到后悔。