The adverb is a word that modifies a verb. An adverb tells more about how the action occurs.
Adverbs often end in -ly.
Here are some adverbs: slowly, quickly, loudly, quietly, sadly, happily, angrily, kindly, gently, roughly, gracefully
Notice that these adverbs tell more about the way an action is being done.
Betty crept quietly down the stairs. Quietly tells how Betty crept.
Mom gently brushed the dog’s fur. Gently tells how Mom brushed.
Sam ran quickly into the school. Quickly tells how Sam ran.
The crowd roared loudly at the football game. Loudly tells how the crowd roared.
Each of these adverbs ends in -ly, and each adverb is placed right next to the verb that it modifies.
Look at this sentence: John walked down the hall slowly.
The adverb slowly is at the end of the sentence rather than next to the verb. We call this a dangling modifier. The adverb is dangling at the end of the sentence when it should be right next to the word it is modifying.
To avoid a dangling modifier, put the adverb right beside the verb that it modifies, like this:
John walked slowly down the hall. Slowly tells how John walked, so slowly must be right next to walked.
An adverb modifies a verb by telling more about the action. An adverb should sit right next to the verb it modifies. Many adverbs end in -ly.