基于COCA语料库的动词“Require”的扩展意义单位研究

A Corpus-Based Study of the Extended Unit of Meaning of the Verb “Require” in COCA

摘要: 本研究借助美国当代英语语料库(COCA)，依托Sinclair扩展意义单位模型，从语域分布、搭配、类联接、语义倾向、语义韵五个维度对动词require进行量化分析。研究发现：require高度偏向正式书面语体，学术文本占比最高(25.52%)，口语、小说、影视等通俗文体合计不足12%；高频搭配涵盖制度法规、资源投入、医疗干预等；类联接以被动、动宾、不定式补足、介词后置为主，合计逾90%；语义倾向以中性客观为主；语义韵中性主导(86%)，消极占11%，积极仅3%。从语类分析看，学术、法律等语类强调规范性、客观性与去人称化，require所表达的义务、条件与必要性契合该类语类的修辞规约，故高频出现于正式书面语。从语用学看，require实施指令性言语行为，具有潜在面子威胁；被动结构、介词后置等类联接通过弱化施事、突显规则与条件，降低面子威胁，符合学术与规章语篇的客观化表达需求。语义倾向与语义韵的中性主导亦受语类评价规范制约：require主要承担概念功能，评价功能多由搭配词与语境承担，学术法律语类评价克制，故中性语义韵占绝对主导，消极语义韵仅集中于医疗风险语境，积极语义韵极少。研究可为高中英语词汇教学提供真实语料支撑，推动语境化、词块化教学落地。

Abstract: This study uses the Corpus of Contemporary American English (COCA) and Sinclair’s Extended Unit of Meaning model to analyze require in terms of register, collocation, colligation, semantic preference, and semantic prosody. The findings show that: require is strongly biased toward formal written registers, with academic texts highest (25.52%) and colloquial, fiction, and film/TV registers below 12%. Its high-frequency collocates involve institutional regulations, resource investment, and medical intervention. Colligations are mainly passive, verb-object, infinitive complementation, and postposed prepositional structures (>90%). Semantic preference is mainly neutral; semantic prosody is neutral-dominant: 86%, negative: 11%, and positive: 3%. From a genre-analytic perspective: academic and legal genres emphasize normativity, objectivity, and depersonalization, which align with require’s obligation, condition, and necessity. Pragmatically, require is a directive speech act with face threat; passive and postposed prepositional patterns mitigate it by suppressing the agent and foregrounding rules and conditions, conforming to the objectivized expression requirements of academic and regulatory discourse. The neutral dominance of semantic preference and semantic prosody is also constrained by genre-specific evaluative norms: require mainly serves an ideational function, with evaluation largely conveyed by collocates and context. Academic and legal genres are evaluationally restrained, so neutral semantic prosody is absolutely dominant, negative prosody is confined to medical risk contexts, and positive prosody is extremely rare. This study provides authentic corpus-based support for senior high school English vocabulary teaching and facilitates contextualized and chunk-based vocabulary instruction.