Posted by: Teachers-to-GO! Online Education Platform
Use a Serial Comma in a List
The serial, or Oxford, comma is a controversial rule of grammar. Some want to eliminate it altogether while others just don’t know how to use it. The serial comma is the last comma in a list, usually appearing before “and.” The serial comma comes after “dog” in this sentence:
Pets R Us has lizards, dogs, and birds.
Commas separate units in a list. In the above case, each unit only has one part, so it’s easy. Where people get confused is when the units are bigger, but the rule still applies:
Pets R Us has lizards and frogs, dogs and cats, and parakeets and macaws.