PRESCRIPTIVE GRAMMAR VS. DESCRIPTIVE GRAMMAR
By Marc L. Nash
"Many grammars begin their discussion of word-forms by saying, 'There are eight parts of speech in English: nouns, pronouns, verbs, adjectives, adverbs, prepositions, conjunctions, and interjections.' We cannot afford to accept such a statement without asking two very important questions: How do we know? And why? Neither of these questions is frivolous. In fact, the failure to ask them--and to insist on reasonable answers--has been responsible for a great deal of confusion." (Myers, L. M. American English)
The term GRAMMAR has a tendency to conjure up rather negative feelings. One reason for this may have to do with our associating it with correction; someone correcting our speech or writing, someone telling us that a certain combination of words or certain punctuation is wrong or "non-standard." Grammar can be a highly emotional and polarizing topic, perhaps no different than religion or politics. Thus some people have strong feelings against grammar correction because it represents an attack on their unique way of speaking--their personal idiolect/dialect.
There are many different types of grammars; in fact, the word grammar has versatile meanings. If we look-up the word 'grammar' in a respectable dictionary, we will see that, first, it comes from the Greek "to write," so that the British adopted the word for the teaching of Latin in their famous grammar schools or colleges. Second, it means "What is preferred and what is avoided in the syntax of language" (The Oxford English Dictionary--OED). The dictionary will be of no further use in guiding us through the confusion and controversy behind the two most common schools of grammatical thought--the prescriptive and descriptive approaches.
The prescriptive approach is primarily concerned with laying down rules for usage and stop language deterioration. The grammar of this school of thought prescribes the right forms of the language. Purists, who believe that English can be reduced to a system of rules, sees their job as "fixing" language because "our language is extremely imperfect. . . it offends against every part of grammar. Most of the best authors of our age commit many gross improprieties, which ought to be discarded," are the words of Robert Lowth (1710-87), one the most influential of the eighteenth-century advocates of prescriptive grammar (Pyles and Algeo, 206-209).
In prescriptive grammar, one essentially starts with the rule system. The rules are given and the output of the rules is the set of "correct" sentences or proper usage of English. There is no place in this model for a sentence which does not conform. The sentence, “I ain't got no money" is rejected as improper and simply ignored because it is outside the scope of the system.
The same sentence is not rejected or ignored by the descriptive grammarian. The rule system for the descriptive grammarian is the opposite. They start with the actual sentence and build the rule system based on that sentence. To the descriptive grammarian, grammar is simply a set of rules. These rules are generalizations or statements about gathered data. This data includes written and spoken English, and it