No Commas with Compound Subjects and Objects (ACT English)

This is one of the most common errors involving commas on the ACT, and it's one that's very easy to identify and fix.

Compound Subject = Subject made up of nouns linked by and.
Compound Object = Object made up of nouns linked by and.

A comma is never necessary between the nouns of a compound subject or object.

Compound Subject Errors

Correct: The cover and the binding of the old book are beginning to disintegrate.

Incorrect: The cover, and the binding of the old book are beginning to disintegrate.

Compound Object Errors

Correct: While cleaning my room, I picked up numerous books and magazines that had been lying on the floor.

Incorrect: While cleaning my room, I picked up numerous books, and magazines that had been lying on the floor.