在《诗经·小雅》中的145个“其”字句的基础上(重复出现不计),探讨“其”字的用法规律。“其”字作实词主要是代词和副词,作代词包括人称代词和指示代词,在句首时全部是代词,可以作主语和宾语,在句中作代词时多是修饰名词的定语;作副词包括程度副词,时间副词和语气副词。作虚词时是助词、连词和语气词,作语词只有一例。 On the basis of 145 “” words in “The Book of Songs Xiaoya” (repeated excluding), the usage law of “its ” is discussed. “ ” The main factual words are pronouns and adverbs, as pronouns include personal pronouns and demonstrative pronouns, all pronouns at the beginning of the sentence, you can make the subject and object, in the sentence as a pronoun is mostly attributive modifiers; Adverbs include degree adverbs, adverbs of time and tone adverbs. For function words is the auxiliary word, conjunctions and mood words, only one case of words.