This document provides rules for adding the "-ed" ending to verbs and adjectives in English. It discusses: - Regular past tense verbs and past participle adjectives simply add "-ed" (played, worked, bored). - For verbs ending in a consonant + "e", just add "-d" (lived, danced, smiled). - For verbs ending in a consonant-vowel-consonant pattern where the final syllable is stressed, double the final consonant (stopped, planned, admitted). - For verbs with two or more syllables where the final syllable is unstressed, do not double the final consonant (happened, opened, visited