In modern Liangshan Yi language, sinip, like he （ 和 ） in Chinese, is a particle which shows the coordinate relation and has no specific meaning and cannot be used alone. But no matter it is in Yi language or in Chinese, these two words are both very important. Once they are combined with other words, they will have grammatical meaning. In this text, some examples are given to show severl grammaticla meanings of sinip in modem Liangshan Yi language different from those of he （ 和 ） in Chinese, namely, besides being a linking word, it can be a structural auxiliary word, and a preprosition in some special situations.