In English grammar,-------- deals with formation of sentences. ?

In English grammar, the concept that deals with the formation of sentences is called Syntax. Syntax is a fundamental aspect of linguistics that focuses on the arrangement of words and phrases to create well-formed sentences. It dictates how different elements of a sentence, such as nouns, verbs, adjectives, and adverbs, come together to convey clear meaning.

To differentiate it from other terms, Morphology pertains to the structure and formation of words, including the study of root words and affixes. Etymology is concerned with the origin and historical development of individual words, tracing back how their meanings and forms have evolved over time. Semantics, on the other hand, deals with the meanings of words and sentences, exploring how they convey concepts and ideas.

Thus, while all these branches of linguistics are interrelated and essential for understanding language, Syntax stands out as the domain that specifically addresses sentence structure. Remember: Syntax - Sentence Structure; Morphology - Word Structure; Etymology - Word Origins; Semantics - Meaning.