Capitalization is used in abbreviations such as A.M., P.M., A.D., B.C., and Postal Service state abbreviations. In this chapter the student will use the rules of correctly using commas. There are too many rules for the use of the comma to list. In this chapter the student will identify word usage problems in sentences. In this chapter the student will identify words that are easily confused.
Some words sound alike but are spelled differently.
Some words are similar in spelling but have different meanings so are easily confused.