Researchers in SLA have mainly focused motivation study on definition, classification and model building, drawing less attention to the time element and the role of motivation in other SLA fields.

• 摘要二语习得研究者一直以来着重学习动机在概念、类型划分、模式构建等方面的研究，却忽视了动机的时间视角及动机在二语习得的其他领域所起的作用。