At home, the study on the negative transfer of mother tongue started from 1900s。 Wang (1999) summarized and reviewed the research on language transfer from 1950 to 1990, discussing some unsolved problems of research in the field of language transfer and providing the future direction。 Dai and Wang (2002) analyzed four core issues in the study of language transfer: definition, comparison, prediction and generalization of migration。 Wu (2006) and Ai (2008) analyzed the causes of the negative transfer of mother tongue and put forward some suggestions。 

1。2 Importance of Writing Teaching

In English teaching, there are four basic skills: listening, speaking, reading and writing。 Generally, these four skills can be pided into two groups。 Listening and reading are input skills while speaking and writing are output skills。 Writing is one of the important outputs in the process of language learning, and also the most complicated and difficult task in the four skills of language competence for most junior school students。 Liu (1999) pointed out that only the writing competence could reflect language self-cultivation of one person。 Harmer (2000) said that writing teaching is important not only because writing includes reinforcement, language development, and learning style, but also because the most important is writing as a skill in its own right。 Therefore, as an important tool to measure students’ language competence, English writing can reflect the grasping state of vocabulary, grammar and thinking in English。文献综述

According to the National English Curriculum Standards(2011) published be the Ministry of Education, students in junior school should be capable of writing a composition with no less than 80 words without profound grammatical errors。 Own to the National English Curriculum Standards, more and more teachers and students are aware of the significance of English writing。