Irregular verbs are often the most commonly used verbs in the language. Thus for example a school French textbook may have a section at the back listing the French irregular verbs in tables. The idea of an irregular verb is important in second language acquisition, where the verb paradigms of a foreign language are learned systematically, and exceptions listed and carefully noted. Irregular Verbs Worksheets Terms of Use In contrast to regular verbs, irregular verbs are those verbs that fall outside the standard patterns of conjugation in the languages in which they occur.