CONJUGATION - Irregular verbs

Regular verbs form their past and past participle forms by adding -d or -ed to the verb's present tense. Thus, use becomes used, and call becomes called.

Irregular verbs form their past and past participle forms differently. The present tense break becomes broke in its past-tense form and broken in its past participle form. The present tense verb buy becomes bought in its past and past participle forms.

Most verbs have past tense and past participle in –ed ( worked, played, listened). But many of the most frequent verbs are irregular.

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. 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.