چكيده
I really lack words to thank my supervisor, Dr. Shahrokhy, for her mindful cooperation, insightful supervision, objective ideas and feedback on this thesis, and all her time and patience during my work. I owe her special thanks for editing and revising my thesis and all her commitment and valuable comments and the time she devoted to study this thesis. I sincerely thank my committee members for their devotion of time to read this thesis and for their precious suggestions.
I also must show my appreciation to all the instructors teaching in Foreign Language Department at the Payame-Noor University, Najaf Abad Branch for the kind efforts they made during the years of my education. My deepest appreciation and love also go to my family whose help was accompanying me during my academic journey. Of course, nothing of this would have been possible without the love and support from my family.
