Grammar is an important subject in language studies, and it can be broken down into four main components: Nouns, Tenses, Syntax, and USAGE. Nouns are words used to name people, places, things, or ideas. Tenses refer to the form of a verb that indicates when an action took place. Syntax is the arrangement of words and phrases to create well-formed sentences in a language. Lastly, USAGE is the way in which words and phrases are actually used in a language.