However, it is not only a teaching method, but also a new approach that is based on second language acquisition theories.

然而任务型教学不仅是一种教学方法，而且是一种基于二语习得理论的新型教学理念。

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Second and foreign language acquisition theories are reviewed from functional, communicative, and cognitive points of view.

对第二语教学和外语教学理论从功能的、交际的和认知的角度进行了理论回顾。

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Chapter Two briefly introduces cooperative learning, communicative teaching and the second language acquisition theories, which provides the theoretical basis for this study.

第二章对合作学习、交际法教学、二语习得的相关理论进行简述，为本研究奠定理论基础。

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