An adverb is a word that is used to modify a verb, an adjective, or an adverb. Adverbs are invariable; that is, they have only one form. Adverbs are used in a sentence to indicate manner, time, place, cause, or degree and to answer questions such as how, when, where, or how much. The placement of the adverb in Italian can be tricky, but the general rule states that when an adjective is modifying a verb, it should be placed after the verb: Mangio volentieri in quel ristorante. (I will gladly eat in that restaurant.) When the adverb modifies an adjective, it is placed in front of that adjective: Maria è molto coraggiosa. (Maria is very courageous.)