本文基于学习者个体差异理论,侧重研究影响二语习得的内因,包括学习者的性别、性格、学习的动机及目的等。得出的结论是部分内因的影响异于一般二语习得理论的相关表述,并分析出积极影响二语习得的内因,从而提高外语教学的效果。 Based on the individual differences theory of learners, this article focuses on the study of the internal factors affecting second language acquisition, including learners’ gender, personality, motivation and purpose of learning. The conclusion is that some of the internal factors are different from the general expressions of second language acquisition theory and the internal factors that positively influence the second language acquisition are analyzed to improve the effect of foreign language teaching.