these are the different "AR" verb endings for each subject pronoun. to do this you first cut off the "AR" part of the word. i.e. hablar-->habl... then you add the proper ending. For yo, I, it's o so then you would add o on to the end. i.e. hablar-->habl-->hablo=> how to do it for yo. If ou have trouble knowing the subject pronouns check out the other set called "Subject Pronouns"