This paper proposed an alternative way to teach argumentative text based on systemic functional linguistics. The design employed is case study which allows an investigation to retain the holistic and meaningful characteristics of real-life events. In this case, it is conducted to untangle students' problem in writing argumentative text. Based on the previously conducted analysis, it was discovered that grade X Senior high school in Bandung encounter some problems in writing argumentative text such as tense formation, the improper use of process and finites, the absence of subject, and inappropriate thematic progression. Based on these analyzed problems, a solution called Fishbone strategy is proposed. Belonging to diagram-based approach, this strategy allows students to construct and deconstruct the text in order to comprehend both the general and detailed information of the text. Moreover, it allows a thoughtful analysis, easy to implement by means of visual representation and even after the need has been addressed, the fishbone diagram shows many areas of weaknesses that can be revised.