Sentence examples for is a sure warning from inspiring English sources

The report is a sure warning, if any warning was needed.

If power is back-fed to the circuit panel (through grid-tie inverters or generator), make sure there is a prominent warning to that effect for electrical service people, or they may turn off the service connect and get electrocuted when they assume there is no power.

But a warning is a warning.

"The Circle" is a warning.

It is a warning.

Russia is a warning bell.

This is a warning.

The first is a warning.

A very loud bee was making a racket which I was sure was a warning to her of my presence.

A warning was a warning.

I'm not sure if that was a lack of warning.