Irregular Verbs | Grammar Rules
https://www.grammarbook.com/grammar/irregular-verbs.aspEnglish verbs are either regular or irregular.We call a verb regular when we add ed (wanted, looked) or sometimes just d (created, loved) to form what are called the simple past tense and the past participle (see third and fourth paragraphs below). A regular verb's simple past tense and past participle are always identical. Not so with irregular verbs.