Verbs express actions, states of being, or conditions. There are different types of verbs including action verbs, linking verbs, helping verbs, present/past/future tense verbs, transitive verbs, and intransitive verbs. Verbs tell what the subject does or is. Key types are action verbs which show physical or mental actions, linking verbs which link the subject to a predicate expressing a state of being, and helping verbs which help express meaning along with a main verb.