ENGLISH:
The purpose of this study was (1) to find out the correlation between students’ parts of speech mastery and writing achievement. In this researcher employed correlational method by using quantitative approach. There were two variables in this research. The independent variable
(X) is Parts of Speech and the dependent variable (Y) is Students’ Writing Achievement. The population of this research involved all the twelfth grade students at SMA Plus Bahrul Ulum in the academic year of 2023/2024 which of 83 students. The sample was taken by using total sampling technique. The data collection methods in this research were multiple choice and test. The information was examined by utilizing SPSS 26.0 program. Researcher utilized the Pearson Product Moment correlation to discover the correlation result. The correlation result rcount = 0.361 and significance value is 5%. The rtable for N=83 is 0.220. Therefore, rcount is more rtable (0.361>0.220) which mean there was a correlation within those variables. The correlation is considered as “sufficient correlation” because rcount (0.361) is between 0.20 – 0.399. In addition, the significance value was less than 0.05 (0.000<0.05) which indicates that the correlation was significant. Therefore, the Null Hypothesis (Ho) is rejected and Alternative Hypothesis (Ha) is accepted. In conclusion, there was positive correlation between parts of speech and students writing achievement. That means, students who have mastery of parts of speech would have better in writing achievement than who are not.