This document discusses the differences between "-ed" adjectives and "-ing" adjectives in English. "-ed" adjectives are used to describe how people feel, such as feeling frightened or tired. "-ing" adjectives are used to describe things, people, and situations, such as a frightening room or tiring work. Several examples of commonly used "-ed" and "-ing" adjective pairs are provided, like annoyed/annoying and bored/boring, along with examples of how to use them in sentences.