Here is the difference between regular and irregular verbs: Regular Verbs Regular verbs are the ones whose past participles and past simple forms are formulated with an addition of suffix meaning adding “ed” at the end of word (e.g., I walked back to home that day). Irregular Verbs Irregular verbs are the ones that make their own full form of word in past simple and past participles tenses without having the need of adding suffix by the end (e.g., The teacher taught us a new lesson in school today).