
(You can picture a dog running, wagging its tail, panting happily, and looking glad to see its owner. (You can picture a dog running, but you don’t really know much more about the scene.) Notice that the second of these two sentences is much more interesting simply because it contains an adverb:

Adverbs normally help paint a fuller picture by describing how something happens, such as However, spotting an adverb, especially one that ends in -ly is easy. Traditionally considered a single part of speech, adverbs perform a wide variety of functions, making it difficult to treat them as a single, unified category.
