The document discusses adjectives ending in -ed and -ing and provides examples of words that can take both suffixes with different meanings. It explores adjective pairs where -ed indicates past tense and -ing indicates present participle, like tired/tiring. It also gives sentences using fascinating adjectives like interested, exciting, tiring, and frustrating to illustrate how the suffixes change the meaning of the adjective. The document encourages working in pairs to ask follow up questions to better understand the concepts.