In our situation you have to keep on trying people.

The important thing is to say sorry when you get things wrong and to keep on trying.

We must keep on trying until he does come to us.

Even if you turn me down, I'll just stick around and keep on trying.

"Who are we to say a student shouldn't keep on trying?"

But I tried just the same and kept on trying.

We'll keep on trying so long as you're willing to go along with us.

You only can just keep on trying, and eventually it will break through.

And where we go from here, though, we'll just keep on trying.

However, this is no reason why we should not keep on trying.