Comma Before And

Comma Before And

If there are only two things in a list, they do not need to be separated by a comma. If there are more than two ideas, the comma should be used as it would in a list. (See Oxford Comma.)

The purpose of a comma is to clarify lists, and conjoin ideas.

The compound predicate, is to clarify lists and conjoin ideas, does not require a comma. The comma should be removed.

The dog is young but well trained, and good natured.

The dog is young, well trained, and good natured.

The comma in the last sentence is correctly placed because it is being used to clarify the elements in a list.

A comma should also be placed before and if and is at the beginning of an independent clause.

One purpose of a comma is to clarify lists, and another purpose is to conjoin ideas.

The dog is young, and it’s also well-trained.

It’s cold outside, and I can’t find my coat.

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