This is a series of articles on my blog regarding common comma errors. In each article, I describe the problem and show the correct use of commas for each.
PART 1 - To Set off Introductory Dependent Clauses
PART 2 - To Set off Introductory Prepositional Phrases
PART 3 - In Dialogue Punctuation
PART 4 - When Joining Independent Clauses
PART 5 - To Set off Participial Phrases
PART 6 - To Set off Interrupting Elements
PART 7 - To Set off Non-Restrictive Clauses
PART 8 - Commas in Series
PART 9 - Comma, Semi-colon, or Period
PART 10 - Commas in Dates and States
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