The aim of the study was to investigate how four pupils in sixth grade use language when writing narrative texts, examined in relation to the typical structure and linguistic features of a narrative text. Another aim was to explore the similarities and differences between texts which received an A or B grade and texts with a D or E grade. The pupils’ texts are analysed from a systemic-functional perspective on language and on the basis of the typical structure and language of a narrative text, with the focus on expressions of time, processes, descriptions and nominal groups (cf. Johansson & Sandell Ring 2012). The main finding is that the four pupils in their texts master the normal structure of a narrative text and that their texts have expressions of time, processes, descriptions and nominal groups, but they differ in extent and scope. The greatest differences between the narratives in the different grading categories are found in the introductions to the texts, the way of marking dialogue in the structure, and how the pupils use processes, circumstances and nominal groups to achieve descriptions. The text that received an E grade differs from the other texts that were graded as A, B and D, in that the writer has the shortest introduction to the text; the introductions to the other texts are relatively long. The E-graded text also differs from the other texts in the way it marks dialogue. That pupil uses quotation marks to indicate where dialogues occur, whereas the texts with A, B and D grades use a quotation dash to mark speech. All the pupils’ texts contain expressions of time. The texts also include several kinds of processes, except for the text that received a B grade, where there were no mental processes. The texts graded as A, B and D use expanded nominal groups and also various processes and circumstances to create descriptions. The text that received an E grade is the one that uses most expanded nominal groups for descriptive purposes.