The document discusses verb tenses and how to change verbs from present to past and future. There are five main ways to change a present tense verb to past tense: adding "-ed", doubling the final consonant and adding "-ed", dropping the final "e" and adding "-ed", changing "y" to "i" and adding "-ed", and changing the spelling entirely. Future tense is formed by adding "will" to the present tense verb. Adding "-ing" follows the same rules as changing to past tense, except spelling changes and dropping "y".