helping verbs:
am, is, are, was and were, being, been, and be, Have, has, had, do, does, did, will, would, shall, should, may, might, must, can, could.
linking verbs:
Be, am, is, are, was, were, has been, any other form of the verb “be”, become, and seem. There are other verbs that can be both linking verbs and action verbs. All of the sense verbs; look, smell, touch, appear, sound, taste, and feel can be linking verbs.
action verbs:
Action verbs, also called dynamic verbs, express an action whether it be physical or mental. An action verb explains what the subject of the sentence is doing or has done. Looking at action verb examples helps make it clear the function of action verbs in sentences and what purpose they serve.
