This document provides rules for forming the past simple tense of regular verbs in English. It states that most regular verbs are made past by adding "-ed" to the base form. Exceptions include verbs ending in "e", which only add "-d", verbs ending in a consonant + "y" which change the "y" to "i" before adding "-ed", and some one-syllable verbs which double the final consonant before adding "-ed". It provides examples to demonstrate applying these rules to create the past simple form of common English verbs.