“African American Vernacular English is not a random collection of errors but a well-formed linguistic system with its own rules and grammar.”— William Labov
“Hypercorrection is the over-application of a perceived rule of grammar or pronunciation in an attempt to appear more formal or educated.”— William Labov
“Certain universals of grammar are demonstrable from a consideration of the order of meaningful elements.”— Joseph Greenberg
“If a language has dominant VSO order, then the genitive always follows the governing noun.”— Joseph Greenberg
“A preposition's a word that shows the relationship between a noun or a pronoun and some other word in the sentence.”— Brian P. Cleary
“That a man who has been professedly a teacher of others, should discover on every occasion, a want of the common principles of grammar, is truly curious.”— William Emerson