Bad vs. Badly—What’s the Difference? | Grammarly
www.grammarly.com › blog › bad-badlyBadly, like most words ending in -ly, is an adverb and is used to modify verbs. The thing that trips most people up is that linking verbs such as to be and to feel take adjectives rather than adverbs. Why do people use bad and badly incorrectly so often in their writing? The simple answer is that we hear them misused frequently in casual talk.