You may learn something.
Web Bonus: List of Common Modals
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Brians, P. Common Errors in English Usage. Wilsonville: William, James & Co., 2003, p. 131.
Garner, B. Garner's Modern American Usage. Oxford: Oxford University Press. 2003, p. 513.
may. Dictionary.com. Dictionary.com Unabridged (v 1.1). Random House, Inc. http://dictionary.reference.com/browse/may (accessed March 9, 2008).
may. Merriam-Webster Online Dictionary. http://www.merriam-webster.com/dictionary/may (accessed March 9,2008).
Merriam-Webster's Dictionary of English Usage. Springfield: Merriam-Webster, 1994, p. 627.
"Some Common Solecisms,”The Economist.com Style Guide
Strumpf, M. and Douglas, A. The Grammar Bible. New York: Henry Holt and Company, 2004, p. 77.