In a natural environment a water-worn pebble would take years to form.

The two became close friends and years later formed the full-band incarnation of Enerate.

However, less than a year after the Faeries formed, internal pressures threatened to fracture the group.

The final two years form the clerkship curriculum that takes place in hospitals and ambulatory clinics.

The nation elects seven representatives every four years to form a Legislature.

Right now, it is important to see that thirty years of covert operations, in many respects, form a single continuous whole.

The next year, about a dozen shoots will form from the roots.

These two years form Key Stage 1 in the English education system.

A year or so later the same design formed the basis for an 0-8-0 tender engine for India.

These four years form Key Stage 2 in the English education system.