A Irregular verbs are those that follow regular conjugation rules.
B Irregular verbs usually involve adding -dor -edat the end of the base form of a verb.
C Irregular verbs do not follow these patterns either for the simple past or the past participle — or neither one of the two.
D For all irregular verbs, all you have to do is keep the infinitive form of the verb as is and use it for both the past tense and the past participle.
E All irregular verb involves those that use the same conjugation for the simple past and past participle tenses.