1. INTRODUCTION From the 1960's and 1970's, the second language acquisition became an independent discipline. Researcher employed different research methods and made thorough research into how learners acquired the second language from various perspectives, among which few studies focused on how learners acquired passive voice, not to mention learners' acquisition of non-agentive passive voice. In this thesis, the author mainly deals with the relationship between language transfer and acquisition of non-agentive passive voice.
