I regretted leaving her alone.

我很后悔让她自己一个人。

youdao

You made a mistake in leaving her alone.

你将她一个人留下是错误的。

youdao

I was uneasy about leaving her alone in that state.

她独自留在那个国家使我不安。

youdao

If he'd stayed right here in the warm truck, he'd be getting the chance, instead of leaving her alone to do it.

NPR: Excerpt: 'The Assassins Gallery'

Her husband died of a heart attack, leaving her alone with their three children and a small clothing store in dire straits.

FORBES: How a Subtle Difference in Attitude Transformed a Small Store into a Global Brand

Then later, after her marriage fell apart, leaving her alone, she joined a shooting club to practice and share that interest with others.

FORBES: More Pistol-Packin' Mommas At Home On The Range