This document discusses different uses of verb forms ending in "-ing" in English, including gerunds, participles, and participial adjectives. It provides examples of gerunds used as subjects and objects of verbs and prepositions. It also discusses participles used in progressive tenses, participial adjectives that describe nouns, and other usages of "-ing" forms after time linkers, "go", possessive adjectives, and in constructions with "there is no".