Lee, Wing YinWing YinLeeDr. YANG Yike2022-08-252022-08-252022Journal of Applied Linguistics and Language Research, 2022, vol. 9(2), pp. 81-95.2376-760Xhttp://hdl.handle.net/20.500.11861/7234https://www.researchgate.net/profile/Yike-Yang-2/publication/361688877_Acquisition_of_English_Plural_Marking_by_a_Cantonese-English_Bilingual_Child_A_Corpus-based_Case_Study/links/62bfb3943d26d6389e8aca77/Acquisition-of-English-Plural-Marking-by-a-Cantonese-English-Bilingual-Child-A-Corpus-based-Case-Study.pdf?_sg%5B0%5D=started_experiment_milestone&origin=journalDetailWith regard to the nature of simultaneous bilingual acquisition, more studies on different aspects of bilingual language acquisition are required to determine whether these two linguistic systems are developed autonomously or interdependently. This corpus-based longitudinal study aims to provide new evidence concerning this controversial issue by examining the acquisition of English plural marking by a Cantonese-English simultaneous bilingual child and an English-speaking monolingual child. The results revealed that, overall, the bilingual child produced more errors in plural marking, with all of them being required but omitted (RO) errors. Moreover, it was found that over-regularisation (OG) was absent in the bilingual’s production of plurals. Furthermore, regarding the development sequence, it was found that the bilingual child lagged behind the monolingual child and achieved mastery of plural marking at a later age, which may have been related to the inevitably less frequent English input received by the bilingual child.enLanguage AcquisitionBilingualismPlural MarkingCorpus-Based StudyEnglishPeer Reviewed Journal Article