This document provides instruction on conjugating Spanish verbs. It explains that verbs are conjugated to indicate who is performing the action and when. For the first person singular "I", the verb typically ends in "o", such as "como" meaning "I eat". For the third person singular "he/she/it", verbs ending in "ar" change to "a", and verbs ending in "er" or "ir" change to "e". However, there are some exceptions where the middle letters also change, such as "tiene" meaning "he has". Additionally, some commonly used verbs take on the ending "go" for the first person singular instead of just "o".