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Use a comma to separate contrasting parts of a sentence. Example: That is my money, not yours. Rule 16a. Use a comma before and after certain introductory words or terms, such as namely, that is, i.e., e.g., and for instance, when they are followed by a series of items.ule 1. Use commas to separate words and word groups in a simple series of three or more items. Example: My estate goes to my husband, son, daughter-in-law, and nephew.
Deciding when a comma is necessary. If two or more adjectives are coordinate, a comma is used to separate them to provide clarity. If you can replace the comma with the word âandâ and reverse the order of the adjectives, the comma is necessary. Check out the below examples: Example 1 (CORRECT): Slippery, treacherous roads are common after a big snowfall.