Sentence examples for certainly know from inspiring English sources

Advertisers certainly know it.

They certainly know better.

Yes, I certainly know that.

But they can't certainly know.

I certainly know (slightly) more.

They certainly know about them now.

They certainly know what is happening.

Well, they certainly know where they stand.

"They certainly know what they're doing.

"But we certainly know what to expect".

We certainly know about past diplomatic failures.