The grammar of a natural language is a group of structural constraints on the speaker's or writer's construction of clauses, phrases, and words. The term may also refer to the study of such restraints, a field that includes domains such as phonology, morphology and syntax, often complemented by phonetics, semantics and pragmatics. Theoretical linguistics has developed grammatical structures that seek to give an accurate scientific theory of the syntactic rules of grammar and their function. Functional grammar, dependency grammar and Montague grammar are some examples of such frameworks. Other frameworks, such as generative grammar, cognitive grammar and stochastic grammar, are based on an inherent universal grammar, where the object is placed into the verb phrase. This book is compiled in such a manner, that it will provide in-depth knowledge about the essentials of grammatical theory. It provides comprehensive insights into this field. This book is an essential guide for both academicians and those who wish to pursue this discipline further.