The UVic Writer's Guide
Bad is an adjective ("bad day") or the complement of a linking verb ("I feel bad").
Badly is an adverb ("he putts badly").
Avoid expressions such as "I did real bad," unless you are referring
to the exam in which you used the phrase.
Dictionary of Usage
Table of Contents
Copyright, The Department of English, University of Victoria,
This page updated September 22, 1995