人们在运用 than/as比较分句时 ,由于对其复杂的结构特征缺乏完整的认识 ,更由于对形成这些特征的原因缺乏深入的了解 ,因此 ,在实践中常犯这样或那样的错误。文章试图用简明的语言概括出 than/as比较分句中 ,就同一比较属性比较时所具有的四大结构特征 ,分析其成因 ,从而解释此类分句中最让人困惑不解的“than/as+限定动词”中主语的省略问题 When people use than / as comparative sentences, people often make one mistake or another in practice because of their lack of complete understanding of their complex structural features and their lack of understanding of the reasons for the formation of these features. The article tries to summarize the four major structural features of the relative comparison in the same / comparing clauses in concise language, and analyze its causes, so as to explain the most puzzling “than” / as + qualified verbs "in the elliptical problem