Committee. Considering that any modern standard work on English grammar would furnish information on the subject, it is somewhat surprising that persons who claim to speak with authority on questions of language and literature, should ignore modern advance in grammatical studies. Sweet’s New English Grammar contains a very clear exposition of the nature and functions of grammar. “Grammar is generally used to imply a mainly practical analysis of one special language, in which study, general principles and theoretical explanations are subordinated to concise statements of facts, and definite rules.” (page 4).
“In considering the use of grammar as corrective of what are called ungrammatical expressions, it must be borne in mind that the rules of grammar have no value except as statements of facts; whatever is in general use in a language is for that very reason grammatically correct. A vulgarism and the corresponding standard or polite expression are equally grammatical each in its own sphere - if only they are in general use. But whenever usage is not fixed - whenever we hesitate between different ways of expression, or have to find a new way of expression then grammar comes in, and helps us to decide which expression is most in accordance with the genius of the language, least ambiguous, most concise, or in any other way better fitted to express what is required.” (Sweet’s New English grammar, part I, page 5).
“We do not study grammar in order to get mastery over our own language, because in the nature of things we must have that mastery before we begin to study grammar at all, nor is grammar of much use in correcting vulgarisms, provincialisms and other linguistic defects, for these are more dependent on social influence at home and at school than grammatical training.” (Ibid PP 4 and 5).