The purpose of this study was to determine: 1) the influence of perceptions of the Grammarly method and vocabulary mastery together on English narrative text writing skills, 2) the influence of perceptions of the Grammarly method on English narrative text writing skills, and 3) the influence of vocabulary mastery on English narrative text writing skills. This study used a quantitative method with a survey approach and correlational design. The research sample consisted of 85 eighth-grade students of private junior high schools. The data analysis technique used was multiple linear regression. The results showed that perceptions of the Grammarly method and vocabulary mastery together had a significant effect on students' narrative text writing skills, with a sig value of 0.000 <0.05 and an F value of 110.136. Partially, perceptions of the Grammarly method had a positive and significant effect on writing skills with a sig value of 0.000 <0.05 and a t value of 7.268. Vocabulary mastery also had a positive and significant effect with a sig value of 0.000 < 0.05 and a t value of 8.210. Thus, these two variables play an important role in improving students' narrative text writing skills.
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