请尽量简洁地将以下英文课标注释总结到一句话内。An adverb can specify in what way, how often, at what place, or to what extent something occurs. An adverb can also modify verbs, adjectives, or other adverbs, and is placed either before or after the word it modifies, or sometimes between two words, depending on the structure and context of the sentence.
user
副词用于说明动作的方式、频率、地点或程度，并可修饰动词、形容词或其他副词，位置通常在所修饰词之前、之后或中间。
assistant