What type of verb is it when you don't simply add an "s" at the end when the subject changes to third person singular? English Grammar Parts of Speech Verbs 1 Answer Alan P. Jun 23, 2016 An irregular verb. Answer link Related questions What are linking verbs, helping verbs, and action verbs? How are they different? What's the difference between a verb and an action verb? What is a passive verb? What are some examples? What is a linking verb? Is "is" a verb? What is a verb tense shift? What is a compound verb and some examples? What is the definition of an action verb? What's the difference between a verb, adverb, and adjective? What is a verb phrase? See all questions in Verbs Impact of this question 1200 views around the world You can reuse this answer Creative Commons License