现代汉语中的“倒是”作为一个同形异构体,可以区分为谓词性短语和副词。本文通过对“倒是”与“倒”、“是”、“倒X是”等结构的对比分析,采用同位置替换的方法,从内部结构入手界定其语法性质;基于语法、语义、语用这三个层面对“倒是”所处的外部环境进行探讨。同时本文结合兰卡斯特语料库,对语境中“倒是”的分布与使用情况作出统计、分析,以期对前文有所补充。In modern Chinese, “Daoshi” is a homograph that integrates different linguistic forms, which can be distinguished into predicate phrases and adverbs. This paper compares “Daoshi” with “Dao”, “Shi”, and “Dao X Shi”, and defines its internal grammatical nature through same-position replacement;it discusses the external environment of “Daoshi” from the three levels of grammar, semantics, and pragmatics. At the same time, this paper combines the Lancaster Corpus to statistically analyze the distribution and usage of “Daoshi” in context, to supplement the previous text.