Examples

In this example, was links Tyrell to his current condition, depressed. He must be a Chicago Cubs fan.

Here, the linking verb am connects the subject I with the predicate exhausted.

In this case, the linking verb look ties the nachos to how yummy they appear. Nachos, incidentally, were named after the guy who invented them in 1943: Ignacio "Nacho" Anaya, the greatest man in the history of Earth. When hungry U.S. military wives arrived at his Mexican hotel after the restaurant had closed, he made them a snack out of all that was left in the kitchen: tortillas, cheese, and pickled jalapeños.