A few clouds had gathered about the west, but there was not a single cloud anywhere else to be seen.

This thing you've got here seems, on the other hand, to be just one single spherical cloud.

It was a clear summer night, without a single cloud.

When I set off on a long hike the next afternoon, there is not a single cloud in the sky.

But that couldn't be because there hadn't been a single cloud in the sky for days on end.

But there wasn't so much as a single fluffy white cloud in sight.

Fifteen minutes later she was talking as if there wasn't a single black cloud in her world.

The sky held not a single cloud nor any bird.

She felt as if a single dark cloud was suspended over her head.

There would be a zillion of them before long; she couldn't see so much as a single cloud.