Grammar refers to the rules and structure governing language usage in speaking and writing. It includes elements such as syntax (sentence structure), punctuation, verb tenses, and parts of speech.
Syntax refers to the arrangement of words and phrases in a sentence to create grammatical structure. For example, "The cat chased the mouse" has a different syntax than "Chased the mouse, the cat did."
Conjunction: A conjunction is a word that connects words or groups of words together. Examples include "and", "but", and "or".
Pronoun: A pronoun is a word used in place of a noun to avoid repetition. Examples include "he", "she", and "it".