|Why should we use adverbs in a sentence? Read the sentence before you fill in the blank with an adverb. Which sentence is more interesting to read? In this group of sentences, there are missing adverbs. Select the adverb and complete the sentences in the adverb worksheet. Remember, adverbs answer how, when, and where. The adverbs are at the top of the printable, select from the list and complete the sentences.