The theories and approaches regarding the study of the Chinese historicalgrammar are considered to be an essential guidance for the deepening study of the Chinese historicalgrammar.
汉语历史语法研究的不断深入，离不开汉语历史语法研究理论与方法的支撑和指导。
2
It not only applies to historical comparison between rules of phonology and those of grammar in relative languages, but also applies to some linguistic elements beyond relative languages.
它不仅适用于亲属语言内部语音、语法规则的历史比较，也适用于非亲属语言之间某些语言要素的比较。
3
Because of historical and geographical reasons, Zhoushan dialect has a different grammar from other surrounding areas, which may have research value.