This document provides instruction on pronouncing suffixes like -s and -ed in English. It begins by listing words with these suffixes and their pronunciations. It then discusses how sounds can vary based on place and manner of articulation and voicing. Charts are provided showing voiced and voiceless consonants. Learners are asked to classify words based on their ending sounds and identify uses of suffixes. Common pronunciation errors are highlighted and corrected. The document also covers using the passive voice and participles as adjectives. Learners are given exercises to practice classifying words and correcting errors involving suffixes, passive voice, and other grammar points.