Gently he tapped upon that convenient pipe--once, then twice, then once again.
Then once more he looked up and around, marveling.
Breathing a warning, Johnnie sped to the sink, rapped once, then twice, then once again.
Then once upon a time the god of the moony crest said to him in a dream--"While wandering in the forest thou shalt behold a boy mounted on a lion, take him and go home, he shall be thy son.
Then once upon a time, in the spring festival that king Satavahana went to visit the garden made by the goddess, of which I spake before.
Once a furious yapping sounded from a lighted window far beneath; but he scorned to do more than turn a slow head in the direction of it: then once more he resumed his watch.
Then once more a blast of wind tore up from the south-west, rain shattered against the window, and the house vibrated to the shock.
Then once more it had recurred, a cold and convincing phantom, in the plain daylight revealed by Felsenburgh's Declaration.
Father Francis looked at it a moment, his lips shook: then once more he turned, and went out without a word.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "then once" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.