M.A.K. Halliday (1925-2018) was the founder of Systemic Functional Linguistics (SFL) and, undoubtedly, one of the most influential linguists of his time, credited with changing the way that language and linguistics have been taught. SFL, as an appliable theory that approaches language as social semiotic, is the study of the relationship between language and its functions in social settings. Moreover, SFL conceives of language as a resource for making meaning and organizes language systemica ...