Grammar is a part of human language system. Human beings learn and use language through grammar. However, how a language is acquired by human beings is a mystery. To decipher it, Noam Chomsky proposed the theory of Universal  Grammar  (UG). UG can be considered as a part of the innate language faculty, which can determine what is or is not a possible grammar in advance (Parodi, 2012). Both Jespersen  and Chomsky explained the UG theory. This article briefly discusses the relationship between Jespersen’s UG and Chomsky’s UG. It  discusses how the UG theory has been used to explain the FLA , to judge whether SLA process is guided by UG, and proves the importance of UG in SLA.

Guizhu Zhang. Study on the Role of Universal Grammar in Second Language Acquisition Andassess. Frontiers in Educational Research (2024), Vol. 7, Issue 1: 234-238. https://doi.org/10.25236/FER.2024.070136.

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