This document provides information about gerunds in Spanish. It explains how to form gerunds from -AR, -ER, and -IR verbs by removing the infinitive ending and adding -ANDO or -IENDO. It discusses using the gerund after ESTAR to express an ongoing action. Finally, it notes some irregular gerund forms for verbs ending in a vowel and for verbs where the "i" in the -iendo ending changes to a "y".