In this paper,I explain the importance that discourse studies have had in the general field of linguistics,and in the specific branches of language teaching and translation,respectively.In order to show part of the knowledge that linguists have explored through the analysis of discourse,I draw on systemic functional linguistics and the way this theory can be applied in the explanation of language and its relationship to social context.In addition,I use Swales’model of article introductions and Hyland’s model of metadiscourse as two examples of discourse methods within the branch of language teaching;in turn,I use both the rhetorical structure and the thematic structure approaches as two proposals of analysis that can be applied in the branch of translation.With those models and approaches to discourse,it has been possible for linguists to analyze authentic texts performed in real contexts.