The cliffs and the ground appear to be solid-but maybe they are not.

The ground he was on at the moment appeared to be trembling.

When landing, the ground becomes closer and therefore appears to be moving faster.

Between these two extremes, a middle ground has appeared.

The ground appeared to be several thousand feet beneath me.

The ground appeared to slip one way, my boots another.

It cleared away almost immediately, and the ground appeared far below.

Despite the introduction of a liaison committee in 1950, little common ground appeared between the two sides.

The first ground for the decision appears to be derived from the contract of booking.

The wings of a plane do not "know" how fast the ground appears to move.