1.Traditional Approach (传统分析方法) In traditional approach,grammaticality is viewed the most important index of the language learner's proficiency.Whenever an error occurs,teachers will take great pains to correct it.In fact,not all the errors affect the comprehensibility of children's language behavior,just local errors affect.1.Traditional Approach (传统分析方法) • In traditional approach, grammaticality is viewed the most important index of the language learner’s proficiency. Whenever an error occurs, teachers will take great pains to correct it. In fact, not all the errors affect the comprehensibility of children’s language behavior, just local errors affect