This document outlines rules for adding "-ing" to verbs in English. It discusses how the pronunciation of the vowel sound before the "-ing" affects the spelling. For short vowel sounds with one consonant, the consonant is doubled before adding "-ing". For short vowels with more than one consonant or long vowels, simply add "-ing". Words ending in "e" drop the "e" before adding "-ing". Examples are provided to illustrate each rule.