The formality of language used in social interaction serves as a reflection of the interpersonal power,encompassing HIERARCHY,INTIMACY and SOLEMNITY.Insights into this phenomenon can be found in various branches of functionalist linguistics,including Sociolinguistics,Systemic Functional Linguistics(SFL),Critical Discourse Analysis,among others.However,previous researches have not adequately integrated and systematized these insights,thus failing to establish a comprehensive theoretical framework for the relevant categories.In light of this gap,this paper aims to comprehensively review the existing literature from both inside and outside SFL.The findings demonstrate a many-to-one interstratal realization among situational variables,interpersonal power(as meaning),and formality(as wording).Specifically,interpersonal power(as meaning)can be categorized as a semantic system POWER,and FORMALITY(as wording)as a lexicogrammatical system STYLE.The current study provides a background support for the"POWER↘STYLE"model and its interstratal realization,while also clarifying the future directions of relevant research.
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