成语教学一直是对外汉语教学中的难点,成语同义词的广泛存在更增加了习得的难度,并且大多未得到明确区分。本文基于北京大学汉语语言学研究中心CCL语料库,选取“半斤八两”和“不相上下”两词作对比分析,试图区分两词并作教学建议。 Idiom teaching has always been a difficult point in the teaching of Chinese as a foreign language. The widespread existence of synonyms in idioms has increased the difficulty of acquisition, and most of them have not been clearly distinguished. Based on the CCL corpus of Chinese Linguistics Research Center of Peking University, this article chooses the words “half a catty eighty two” and “comparable” for comparative analysis, trying to distinguish the two words and make suggestions for teaching.