If you don't travel now, you might 'live to regret it'. [=you might feel sorry or disappointed about it in the future]
We 'regret' to inform you [=we are sorry to tell you] that we have offered the job to someone else.
It is to be 'regretted' [=it is regrettable/unfortunate] that the program has lost its funding.
(..) I mean... my sister's just so ugly. All right, Dina... you can be a bridesmaid. Yes! Oh! You will not regret this. Okay, I'm gonna need to see my dress asap, in case I want to change the cut or the color. Synced and corrected by hawken (..)2017 TvShow: Superstore Title: Cheyenne's Wedding Season: 2 Episode 20