Forming Adverbs from Adjectives

Adverbs describe a verb and adjectives describe a noun. Many adjectives turn into an adverb by adding 'ly'. However, there are some adjective/adverb pairs that are not this way, such as good and well. Here's an example of an adjective/adverb pair.

1. "Your hair looks beautiful."

Hair is the noun. Beautiful describes the noun, so beautiful is an adjective. This may also be written this way: You have beautiful hair.

2. "She performed the music beautifully."

In this sentence, the noun is music. At first, you may think that beautifully describes the music. But it actually describes the action, which is performed. So it is an adverb.