In the England of Shakespeare's time, English was a lot more flexible as a language. In addition, Shakespeare was writing as a dramatic poet and playwright, not as a scholar or historian. Combine the flux of early modern English with Shakespeare's artistic license (and don't forget to throw in a lot of words that have either shifted meaning or disappeared from the lexicon entirely), and there are some subtle difficulties in interpreting Shakespeare's meaning some 400 years after the fact. As with most popular playwrights of any era, Shakespeare uses language with facility and power, but with a colloquial freedom as well.
That having been said, there are a number of ways to unlock Shakespeare's meaning based on habit and context. The highlightsbased on importance and frequencyare presented below.
Original material copyright © 2000 the Shakespeare Resource Center
See also: Thou Pesky "Thou", a Shakespeare Resource Center overview of the Bard's usage of thou and you.
Alden, Raymond M. A Shakespeare Handbook. New York: F. S. Crofts & Co., 1925.
Bevington, David, ed. The Complete Works of Shakespeare (4th ed.). New York: Addison-Wesley Publishing Co., 1997.
Corbett, Edward P. J. and Robert J. Connors. Classical Rhetoric for the Modern Student. Oxford: Oxford University Press, 1998.
Houston, John Porter. Shakespearean Sentences: A Study in Style and Syntax. Louisiana: Louisiana State University Press, 1988
Schoenbaum, Sam. Shakespeare: His Life, His Language, His Theatre. New York: Signet Classics, 1990
A Handbook of Rhetorical Devices, http://www.virtualsalt.com/rhetoric.htm
Rhetorical Figures, http://www.uky.edu/AS/Classics/rhetoric.html