The phrase "regret on" is not correct or usable in written English.
You might use the phrase "regret for" as in "I have regret for not having done my homework."
At a Friday news conference, King described her jump as "my one regret on tour" and said, "I would like to have that opportunity again".
There was one mild regret on the Brookhaven campus about the RHIC project.
"Up to You," which recalls early Bobby Brown, is one of the few signs of regret on this album.
And yet, you're the one who will be left with regret on your deathbed for not having lived a life truly authentic to who you are.
Many of the young women, in particular, look back with some regret on very early sexual experiences, and on later ones with virtual strangers.
On the one hand, it can cast a shadow of regret on some life decisions.
Rihanna has posted two expressions of regret on Twitter.
Mr. Kudrin showed no sign of regret on Tuesday.
Winners will be glorious and losers will tweet horrible things that they'll regret on Monday.
"A flood of regret" on Monday was followed by "They sink it's all over.
"I try only to record things that I would regret on my deathbed not having done.
