New words are created, and some old words fall out of favor or are forgotten. The conventions, or grammar, also change. Language Is Guided by Rules. Structure , which governs the use of words, follows certain rules that are less likely to change in a short period of time. People can incorporate new words into their sentences because they learned the syntax of their language.
Every Language Possesses a Structure.
The structure of one language may be different from that of another. People who have the most power in society have historically determined what is proper language. In England the development of rules of grammar distinguished the upper classes from the lower classes. Grammar continues to distinguish classes in America today. No language has a standard form.