This document discusses non-finite clauses in English grammar. It defines non-finite clauses as clauses that cannot stand alone as main clauses and lack person, number, and tense. The document then provides examples of different types of non-finite clauses - including present and past participles, to-infinitives, bare infinitives, and gerunds. It explains the functions these non-finite clauses can serve as subjects, verb complements, pre-modifiers, and post-modifiers. Finally, it distinguishes between finite and non-finite clauses.