Host-register.com

Rules of capitalization and punctuation, as well as commonly mispronounced and misspelled words.

A free monthly self-help writing guide for students of the English language who want to communicate more effectively. Guide covers grammar, punctuation, spelling, cliches, and jargon.

This site will give you information, definition, and rules about commas. Also has links to other sites for further information.

Illustrates the correct use of the apostrophe in spelling the plural and possessive. Gives examples of misuse and the rules and examples for correct use.

A light hearted approach to learning basic English grammar. Featuring 27 lessons contained on two videos with companion workbook/study guide.

FAQ site designed to help CMS users eliminate ambiguities or misunderstandings found in the book itself.

A wide collection of online grammar resources covering grammat topics from articles to verbs.

An explanation of common English usage errors and how to avoid making them.

Explains the difference between similar words with different meanings.

Improve your writing with free daily e-mail grammar lessons.

Modern English Grammar from the Daniel Kies and the College of DuPage.

Starts with remedial lessons and expands to other sites.

This site explains English, so that everyone can understand.

An online grammar book for student editors.

This page, provided by The Writer's Place, discusses various problems and rules concerning English grammar, usage, and elements of style.