We shouldn't rely on sure things when planning for the future; unexpected events always occur.

I checked the report twice, and sure enough, there was a minor error in the figures.

We need to sure up the foundation before the storm hits.

He's going to be late, sure as eggs.

The sure-footedness of the mountain goats allowed them to traverse the narrow ledges without hesitation.

She knew, sure as a gun, that the package would arrive on time.

I told him the restaurant would be busy, and sure as sugar, there was a line out the door.

She will arrive at the appointed hour, sure as fate.

Hiring Maria was a sure bet when we needed someone to lead the project under tight deadlines.

They discovered a sure-enough heirloom watch hidden in the attic.