9 Grammar Commas. Rules for punctuation. Commas (12f). Use commas to separate items in a series – words, phrases, or short clauses Pears, apples, peaches, and plums grow in this climate. (words) My favorite breakfast is milk, biscuits and gravy , and fruit. (words)
Rules for punctuation
2a. N.B. – When an adjective modifies an adjective-noun combination, omit the comma. Check yourself by imagining the word and between the two adjectives – if it doesn’t sound correct, you do not need the comma.
4a. A nonessential phrase or clause adds information that is not needed to understand the main idea in the sentence
*An appositive is a noun or noun phrase that renames another noun right beside it
*Parenthetical expressions are side remarks that add minor information or that relate ideas to each other.