She regretted not seeing it sooner, or in happier circumstances.

We would very much regret seeing Scotland leave the union.

Not a single Arab he knew would regret seeing the Jews disappear.

It was the first time in her hitchhiking career that she regretted seeing an automobile approach.

He regrets seeing Amon use his talent for revenge.

Sam would definitely regret seeing the family lose control.

He regretted not seeing his mother take her afternoon nap but he found a lot of neat things to do with David.

I will always regret not seeing the playwright, particularly as, post-production, I heard such great things about the performances and the man himself.

Soon I shall be regretting not seeing them when they came to my town a few months ago.

Nick sneaks out, betrays his parents, regrets seeing the movie, and gets punished.