My only regret is having to wait three more years.

Her only regret was that she wasn't the cause of it.

My only regret was that I couldn't tell this story to anyone.

His only regret was that he had not been first.

"My only regret is that you got to him instead of me."

His only regret in going back home was that she wouldn't leave her country.

My only regret is that I didn't put him at running back.

My only regret in death would be that I could no longer do these things, and watch over you.

Her only regret was that she wasn't strong enough to go with them.

His only regret was that he hadn't died after all.