This document provides information about Spanish grammar concepts including por vs para, possessive adjectives, commands using poner and no poner, and uses of the subjunctive mood. It defines por and para, listing that por means "through" while para means "to." It provides the short and long forms of possessive adjectives. It explains how to form commands using poner by changing the last letter of the verb's yo form to the opposite vowel and how to form commands with no poner by adding "no" to the front of the verb's yo form. Finally, it outlines uses of the subjunctive mood after verbs of doubt, disbelief, denial, will, and influence.