Document Type : Research Paper
Authors
1 Ph.D. Student of General Linguistics, Department of Linguistics, Faculty of Letters and Humanities, Ferdowsi University of Mashhad, Iran
2 Associate Professor, Department of Linguistics, Faculty of Letters and Humanities, Ferdowsi University of Mashhad, Iran.
3 .Associate Professor, Department of Linguistics, Faculty of Letters and Humanities, Ferdowsi University of Mashhad, Iran.
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