The first language co-exists with the second language in L2 acquirers minds,and the two language systems are being enriched and changed by the two-way transfer between them.

Both quantitative and qualitative research involving sentence production task and judgment tasks, was adopted to make clear advanced L2 learners ability in formal computation and awareness of meaning of different expressions.

This paper first reviews the empirical studies on second language incidental vocabulary acquisition both at home and abroad, focusing on the research content and result.

This paper analyses the background of researches into second language(SL)vocabulary learning strategies,concludes the findings of the researches at home and abroad,and points out that the research trend in this field is to train the SL learners with vocabulary learning strategies.

Austin s Speech Act Theory falls into three types:locutionary acts,illocutionary acts and perlocutionary acts,and it provides a base for second language speech acts.

Effects of Contextual Clues on Word Meaning Guessing in L2 Reading;

Effects of Note Taking in L1 or L2 on L1 Oral Interpretation;

The following changes are identified: The focus of research was shifted from L1 communication to L2 communication;WTC was not only taken as a personality-based,trait-like predisposition,but also as a situation-based variable;Besides,WTC model was reinterpreted and reconstructed from a cross-cultural perspective.

On the application of krashen s second language acquisition theory in English listening teaching;

Research into language output of second language acquisition under the frame of constructivism theory;

On Cognitive Orientation of Second Language Acquisition;