Document Type: Original Article


1 Department of English, Khorasgan Branch, Islamic Azad University, Isfahan, Iran

2 Assistant Professor, Islamic Azad University, Khorasgan Branch


In the introductory stages of language learning, students are exposed to
parative forms explicitly taught in their textbooks. As Knoch (2004) mthis is accomplished by teaching the comparative form of the adjective generally
directly followed by a than clause. This study aimed to compare between native and nonnative material developers with regard to the coverage of
comparative forms. In doing so, two corpora of high school changes were developed and juxtaposed. The data were gathered books and converting them into computerized forms. The data by the frequency percentages of the forms and further examined and compared as
well. The results revealed that there was a significant difference corpora with regard to the coverage of comparative forms.


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