This document provides a summary of English grammar including parts of speech and sentence structure. It explains the basic components of a word such as the stem and inflections. It also outlines the key parts of a sentence including the subject, predicate, object, and complement. Various types of clauses like principal, subordinate, finite and non-finite are defined. Finally, the core parts of speech - nouns, verbs, adjectives, etc. - are described along with their functions in sentences. The document aims to serve as a basic introduction to English grammar.