Since everyone seems to be arguing over punctuation these days, I’d like to share this resource with you.
Three new rules for handling commas
By Don Ranly firstname.lastname@example.org or www.ranly.com.
For the explanation, you need to read his post. In short he says:
Let me state those five once again before I go on:
1. Always place a comma after words in a series but not before “and” or “or” unless the meaning is unclear.
2. Always place a comma after an introductory dependent clause in a complex sentence.
3. Always place a comma after an introductory independent clause in a compound sentence before the coordinating conjunction.
4. Always set off nonessential, nonrestrictive words, phrases and clauses with commas.
5. Always place a comma after introductory participial phrases.
6. Always place a comma after two or more introductory prepositional phrases.
7. Always place a comma after an introductory interjection, an independent element or direct address.
8. Always place a comma between coordinate adjectives.
Some adjectives are never coordinate. They refer to:
1. Color. Example: The sleek red convertible.
2. Age. Example: The tired young man.
3. Material. Example: The expensive silk dress.
4. Shape. Example: The tall round building.
5. Nationality. Example: The prominent French director.
I particularly appreciate the last list.