Identify the part of speech of the underlined word in the given sentence.
He is not normally a very fast runner, but he runs fast in major events.
Here 'very' emphasizes the fast speed of the runner to a high degree and therefore it is an adverb. Adverbs of degree tell us about the intensity or degree of an action, an adjective or another adverb. Adverbs of degree are usually placed before the adjective, adverb, or verb they are modifying.