Ky took a deep breath, then another, and yawned once to open her throat.

She yawned once, twice, and then slept soundly till morning.

Yawning once, he climbed slowly to his feet.

She settled herself more comfortably against him, yawning once again.

Here had once yawned an open pit into which uncounted sacrifices had been drawn down to Hell.

He yawned once, shrugged apologetically, and then sat down on the most comfortable chair.

I yawned once or twice, but it didn't presage sleepiness.

He yawned once or twice and settled down confidently.

And before you finish reading this article, it's likely you'll yawn at least once.

I didn't see him yawn once, in spite of its being so late.