a verb that has an irregular form in the past tense and past participle. Ex.: choose, chose, chosen

forms of verbs used in the dialect of a particular community; these are generally not acceptable in written English or in formal contexts. Ex.: YesterdayI fix the car.

one of the principal parts of every verb: formed by adding —d or —ed to the present; used with the helping verbs have, has, or had, or with a form of be (with passive verbs).

one of the principal parts of every verb: formed by adding —ing to the present

the four parts of every verb: present, past, past participle, and present participle

	Present	Past	Past Participle	Present Participle
Regular Verb	shout	shouted	shouted	shouting
Irregular Verb	choose	chose	chosen	choosing

the times shown by verbs (present, past, future, etc.)