A Study on Acquisition Errors of the Reversible Synonym Pair “Héshì-Shìhé” Based on an Interlanguage Corpus

同素逆序词是汉语中一类比较特殊的词汇，其构词语素相同，语素顺序相反。本文搜集北京语言大学BCC语料库中的相关语料，辨析同素逆序词“合适”和“适合”的异同，之后基于全球中介语语料库中的偏误例句，总结学习者在使用这对同素逆序词的偏误类型并探究偏误原因，提出相应的教学建议，希望对同素逆序词的教学有所借鉴。Reversible-order words with the same morphemes constitute a unique category in Chinese vocabulary, characterized by identical morphemes arranged in reverse order. This study collects relevant linguistic data from the Beijing Corpus of Chinese (BCC) at Beijing Language and Culture University to analyze the similarities and differences between the reversible-order pair “Héshì” and “Shìhé”. Based on error patterns identified in learner corpora such as the Global Interlanguage Corpus, the research summarizes common errors made by learners when using these words, investigates underlying causes, and proposes targeted pedagogical recommendations. The findings aim to enhance the teaching of reversible-order words and provide practical insights for Chinese language instruction.