Grammar 

Common Errors in English 
Scroll down to “Go to list of errors” at the bottom of the page to see a long list of commonly misused and misunderstood words and phrases, from an English professor at Washington State University.

Dr. Grammar: Your Rx for Writing Ills 
From an English professor at the University of Northern Iowa, go to Frequently Asked Questions. Also includes sections on word origins, plagiarism and links to other resources about common grammar errors.

English Usage, Style & Composition  
From Bartleby.com, a collection of reference works including American Heritage Book of English Usage, Strunk & White’s The Elements of Style, Fowler’s King’s English and more.

Guide to Grammar and Writing  
From Capital Community College in Connecticut, this site offers tips, explanations and examples about words, sentences, diagramming sentences, paragraphs, essays, research papers and more.

OWL Online Writing Lab: Adjective or Adverb?
From Purdue University, this site provides basic rules governing the use of adjectives and adverbs and points out common mistakes in usage.

The Parts of Speech 
Explains eight parts of speech and these words can be used. From the University of Ottawa.

Tips-O-Matic 
Clear, easy-to-read explanations of grammar rules and writing tips for Sentences, Paragraphs and Essays from professional writers for a Canadian educational software developer.

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Last Updated: March 16, 2012