A dark cloud cast a shadow over her smile.

So clear was the water that intermittent clouds were actually casting shadows across the bottom of the bay.

Though he is exploring a desolate plateau, the clouds cast new shadows every day.

Light clouds were casting dappled shadows over the flanks of the mountains.

A roughly circular patch of ocean was going dark as if a cloud were casting a shadow.

The dark clouds were almost above him, casting a great shadow.

The clouds cast long shadows on the ice beneath.

A cloud cast a shadow over the sun.

You will now comprehend, reader, why a single small cloud cast a faint shadow on the brightness of my pleasure.

Though it was only late afternoon, rolling gray clouds and heavy rain cast the world into near darkness.