Simple past - Wikipedia
en.wikipedia.org › wiki › Simple_pastFormation. Regular verbs form the simple past end-ed; however there are a few hundred irregular verbs with different forms. The spelling rules for forming the past simple of regular verbs are as follows: verbs ending in -e add only –d to the end (e.g. live – lived, not *liveed), verbs ending in -y change to -ied (e.g. study – studied) and verbs ending in a group of a consonant + a vowel ...