Grammar is a set of rules that govern the use of words and sentence composition. Grammar includes rules for punctuation, sentence structure, and spelling.
Clearly, without a standardized way of using words and putting sentences together, there would be great difficulty in communicating. People learn grammar as they learn language. It becomes so natural that people often do not realize they are using words according to a specific pattern or organization. For example, in English, a noun – verb – object/indirect object sentence structure is used. Adjectives are placed before the nouns they modify. Verbs, in all languages, change tense to indicate when an action has been taken, is taking place, or will take place.
Grammar, when used correctly, makes clear communication possible. For example, a period indicates the end of a sentence, and an apostrophe shows possession and contraction. Additionally, words must be spelled consistently to clearly define their meaning.