Social and Management Research Journal, Vol 17, No 2 (2020) 263-288 https://doi.org10.24191/smrj.v17i2.10536 Copyright© 2020 UiTM Press. This is an open access article under the CC BY-NC-ND license effects of dual-language PrograMMe (dlP) on the usage of english adjectiVes at PriMary school leVel in Malaysia Rashida Nasuha Ramli, Maskanah Mohammad Lotfe, Ainul Azmin Md Zamin* Department of English Language and Literature Kulliyyah of Islamic Revealed Knowledge and Human Sciences International Islamic University Malaysia *Corresponding author e-mail: ainul_azmin@iium.edu.my Received: 31 March 2020 Accepted: 26 June 2020 Online First: 1 September 2020 ABSTRACT Students from selected Malaysian schools are currently learning Mathematics and Science in English under the DUAL Language Programme. They are exposed to additional hours of English compared to non-DLP ones. This paper investigates the extent to which the extra hours of English language exposure assist primary school students in grasping the morphological structures of English adjectives. The cross-linguistic differences in Malay and English could be one of the main reasons students face difficulties in acquiring English adjectives. Data were collated from two different Year 2 classes involving a DLP and a non-DLP group. Vocabulary Size Test (VST) measured the use of base form of adjectives while Comparative Adjective TEST were used for the comparative ones. Test scores were analysed to gauge the possible significant difference between the control and the experimental groups. The fndings reveal that the mean scores for DLP group are not signifcantly higher than non-DLP group for both tests.