Ghazaleh Shafeniya - Islamic Azad University, Khorasgan Branch
AhmadReza Lotfi - Assistant Professor, Islamic Azad University, Khorasgan Branch

In the introductory stages of language learning, students are exposed to comparativeforms explicitly taught in their textbooks. As Knoch (2004) mentioned,this is accomplished by teaching the comparative form of the adjective generallydirectly followed by a than clause. This study aimed to compare differencesbetween native and nonnative material developers with regard to the coverage ofcomparative forms. In doing so, two corpora of high school books and Interchangeswere developed and juxtaposed. The data were gathered by scanning thebooks and converting them into computerized forms. The data were then analyzedby the frequency percentages of the forms and further examined and compared aswell. The results revealed that there was a significant difference between the twocorpora with regard to the coverage of comparative forms.

Comparative Forms, Concordancing, Corpus Linguistics