You said some very regrettable things that night.
The fourth sister accused me of some regrettable things, and refused to let me have a penny.
Neto says this is the only regrettable thing he did in his career.
The regrettable thing is that the speaker was probably right.
"Let this regrettable thing be by all means done quickly."
"It's one of those regrettable things that happen in a campaign like this," he said, "and we're all very sorry for it."
The accident was a very regrettable thing, but it didn't put the restlessness there.
And there he did a very regrettable thing.
However, the most regrettable thing is that we have failed to protect children from azo-dyes.
The woman with the red legs said the admiral tries to prevent regrettable things.