On the 24-hour channel, however, commercials will appear before and after the programs, though not during them.

The commercials appear nearly around the clock on New York's stations.

The ads list the shows during which the commercials will appear.

After the Emerald commercial appears, the Web site will be freshened with new material.

Four candidates whose commercials appear daily on a cable channel are generally viewed as among the leaders in the race.

Only a month after the commercials appeared, they were snatched off the air.

But commercials criticizing the Massachusetts furlough policy for criminals appear to have had even greater impact.

The commercials appear to have been filmed by an amateur who has a bad case of the shakes.

Mr. Perot's commercials appear frequently during this television celebration of the weird and inexplicable.

Some experiments involve the cast of the shows in which the commercials appear, serving as hosts for the breaks.