This document discusses participial phrases in English grammar. It defines participles as verb forms that can function as adjectives. There are two types of participles: past participles that typically end in "-ed" and present participles that end in "-ing". Participial phrases consist of a participle plus other modifiers and objects, and function as adjectival phrases. Examples are given such as "swinging from the trees" and "wearing the red dress" to illustrate participial phrases modifying nouns in sentences.