At the same time the trees began to thin out.

Finally they reached a place where the trees began to thin out.

Trees begin to lose their leaves before the cold winter season.

We still have the daylight, the trees begin to color.

There was about a mile and a half of open country before the trees began again on the far side.

The hills became larger, and real trees began to show along the road.

I saw the trees begin to move in their fury.

The moment they disappeared, the tree began to move again.

The trees were only just beginning to change from grey to green.

However, nearly a year later the tree began to bloom.