In
grammar, a modifier (or qualifier) is a word or
sentence element that limits or qualifies another word, a phrase, or a clause. In English, there are two kinds of modifiers:
adjectives, which modify
nouns and
pronouns, and
adverbs, which modify
verbs, adjectives, and other adverbs. A modifier phrase is a phrase that acts as a modifier; English has adjective phrases and adverb phrases. Neither modifiers nor modifier phrases are usually required by a
clause's
syntax; they are optional, and help clarify or limit the extent of the meaning of the word or phrase they modify.
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