The sun was sinking fast and everything began to change.

An hour passed while the sun sank into the west.

The sun was sinking now, and he'd be completely lost in the dark.

When he rose, the sun was sinking and the cool night coming on.

With every passing moment the sun sank lower in the west.

Then the sun sank lower and the moon rose higher.

Soon the sun sank away in the west as the moon rose to the east.

They got up as the sun sank to the horizon.

The sky was changing as the sun sank low in the west.

The sun had sunk long since, and the children could hardly see.