An adverb is a word that describes a verb, adjective, or other adverb. It can tell how, when, or where an action takes place. Adverbs are compared using "-er" for two things and "-est" for three or more things. Negatives are words like "no" or "not" and should not be used in the same sentence. Punctuation is used in dialogue, including quotation marks and commas. Prepositions show the relationship between nouns or pronouns. Prepositional phrases begin with a preposition and end with a noun or pronoun.