Interlanguage and Its Implications to Second Language Teaching and Learning

Interlanguage refers to the knowledge system which is formed in a certain period learners’ second language learning process. The study on interlanguage of great significance field acquisition. This paper elaborates definition and characteristics interlanguage, analyzes five main factors contributing formation interlanguage.The first factor transfer, especially negative transfer; transfer training, means teacher overemphasized one form or pattern used inappropriate even faulty teaching materials, at same time, teacher’s incompetence identifying non-English forms may also lead interlanguage; third strategies learning, often thought be culture bound; fourth communication; last overgeneralization target language. Through close leading this draws some implications learning: reducing transfer. Teachers can emphasize importance reinforcing responses by rewarding target-like correcting non-target-like ones, learners should encouraged read as much possible English writings native writers. Second increasing cultural information teaching. choose culturally-authentic materials from speech community adopt various techniques. At optimize input environment. are supposed equip with high levels L2 competence provide students right thing way. Another way reduce increase opportunity for output. Moreover, we see that making errors part error-correction help develop towards TL, hence, adopting proper correction importance. Last but not least, applying better avoid occurrence interlanguage.