Verb form (ending in -ing) used as an adj : participle a verb form used as another part of speech : verbal verb form (ending in - ing) used as a noun : gerund group of words (no subject and verb) : phrase verb form preceded by " to " used as noun, adj, or adv : infinitive phrase beginning with preposition : prepositional phrase prep. phrase modifying a noun : adjective phrase participle with complements and modifiers : participle phrase verb (ending in - ing) with a helping verb : verb phrase ?? prep. phrase modifying a verb, adj, or adverb : adverb phrase a conjunction that joins words or groups of words : coordinating conjunction adj. clause essential to meaning of sentence : restrictive clause verbal (ending in -ing) used as noun : gerund phrase