This document discusses verb conjugation in Spanish. There are three types of verbs ending in AR, ER, and IR. Verbs are conjugated based on subject (yo, tu, el, nosotros, ellos) by removing the infinitive ending and adding the appropriate ending. AR verbs add -o, -as, -a, -amos, -an. ER and IR verbs are similar but have different endings for nosotros (-emos, -imos). Examples of conjugating regular verbs like cocinar, comer, and escribir are provided for each subject. The formal "you" is Usted.