Mrs. Nguyen explained to the class that they did well on their achievement exams.
A verb, adjective, another adverb, determiner, clause, preposition, or sentence is typically modified by an adverb. Adverbs often answer questions like "how," "in what way," "when," "where," and "to what extent" by expressing things like method, place, time, frequency, degree, level of certainty, etc.
An adverb is a word that modifies or describes another word, such as an adjective (he sings loudly), a verb (ended too fast), or even a whole sentence (Fortunately, I had brought an umbrella). Although many adverbs finish in -ly, some, like swift, appear exactly like their adjective equivalents.
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