Adverb worksheets for learning about adverbs. What is an adverb? An adverb will describe or modify a verb. Adverbs will often answer the question, when, where, how, in what way, or to what extend. Samples of adverbs are quickly, yesterday, today, hesitantly, rudely. There are many adverbs that end in ly but not all adverbs do. Use these adverb worksheets to enhance the understanding of adverbs. ESL adverb worksheets and printables.