Verbs They seem happy. The cake tastes sweet. How to Identify Linking Verbs: Substitute with "to be": If you can replace the verb with a form of "to be" (am, is, are, was, were) and the sentence still makes sense, it’s probably a linking verb. Example: The soup smells delicious. → The soup is delicious Main verbs can stand alone. Run, eat, work Auxiliary verbs , also called helping verbs, serve as support to the main verbs( Have, has, had, do, does, did, be, am, is, are, was, were, been, being, should, could, would, will, might, can, may, must ,ought(to), shall).