The sky grew so black that the girls could not see to read.

I remember the sky grew dark - and we were there.

The sky grew dark, with night this time, and they could actually see it.

The sky, as seen from the window, had grown blue.

I failed to turn on the light when the sky grew dark and heavy.

It couldn't have been much past four, but the sky was dark and growing darker.

Soon the sky grew dark, and heavy drops began to fall.

The sky was growing gray when the two crews met.

As the sky grew lighter, I saw a dark box set in the ground before us.

Had the sky grown even darker in the past few minutes?