How to use "shapes" in a sentence

I imagine I can see shapes and figures in the fog, and I want to run

For a moment there is nothing, but then two long, grey shapes appear in the clear water, and Jimmy starts to shout again.

But the eyes! Where the eyes should have been, there were two brown shapes the size of saucers

Across the light, great black shapes moved busily backwards and forwards.

At the same time, far away in the south-east, the shapes of three warships appeared, beneath clouds of smoke.

The black powder covered them and softened their shapes