@@ 1.Introduction Discourse refers to a lengthy discussion of a subject, either written or spoken ( Matthews, 2000 : 100).It is a general social cultural phenomenon.If there is no discourse, there is no culture.Besides, people carry out social activities through discourse.As the linguistic research got deepened, linguists began to put discourse in a certain context to study.Therefore, discourse analysis has become a new and considerably valuable study in modem linguistic field.
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