From the perspective of the Task-based Learning theory,this paper reviews the characteristics of Chinese English learners vocabulary competence and then discusses the relationship between speaking and L2 vocabulary acquisition with an attempt to explore the teaching model which develops L2 learners vocabulary competence through oral tasks in college English class.

In this study,an investigation was conducted to prove whether the English-like Chinese passive voice in the writing of Chinese EFL learners is the result of English to Chinese backward transfer,and how backward transfer in general may relate to the Chinese learners\' L2 English proficiency and L1 Chinese proficiency in sentence and discourse tasks.