Verbs show action or state of being and are essential parts of sentences. There are different types of verbs including intransitive verbs that are not followed by nouns, linking verbs that link subjects to adjectives or nouns, transitive verbs that are followed by direct objects, and two-place transitive verbs like "give" and "consider" that are followed by two nouns or a noun and another element. To-be verbs like "be", "is", and "was" link subjects to predicates. Verbs can also be active, showing the subject performing the action, or passive, showing the action being performed on the subject.