Wiktionary
vb. (en-third-person singularkeep up)
Usage examples of "keeps up".
But if the prince that builds upon them knows how to command, and be a man of courage, not dejected in adversity, nor deficient in his other preparations, but keeps up the spirits of his people by his own valour and conduct, he shall never be deserted by them, nor find his foundations laid in a wrong place.
To the very end of the springboard the emulator keeps up his courage and his desire to follow.
Her husband keeps up a running sales pitch with the customer, and when he is done, Honora offers up the beautifully typed page like a magician pulling a rabbit out of a hat.
She just keeps up superstition and gets in the way of the advance of science.
That lower barricade may have a twelve-foot drop on the far side, but if this keeps up, they'll be able to climb over it soon using their own dead as a ramp.
The attack keeps up until nightfall and it's only then that the 2/29th reach us.