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reat part of science of language, but in 1950s,the approach met severe criticism by the Transformational Generative GrammarSchool, represented by Chomsky, who firmly believed that the task of linguistics isthe study on the learner language competence not the language performance and thebest research subject is the language intuition by the native speaker, no matter inwhich method, the collected data is biased (McEnery ＆ Wilson, 2001: 5-13).Quirk, opposed the opinion, who emphases the importance of the “naturalness”of the data, set up new corpus linguistics. He once cited Aldous Huxley words “Ourmost precise theory, most detailed description, is only the very rough andunreasonable simplification of the facts. Each very basic and simple case of the factsis extremely complex.”(Xie Yingguang, 1996: 28). In 1959, Quirk announced the planof “The Survey of English Usage” (SEU). Although the data collected at that time cannot be read by computer, Quirk and the linguists published Modern English Grammarlanguage points and spoken written two libraries, speaking children library sources forour English major college students all participate in level 4 English oral test soundcorpus. College English CET national exams, English professional four and eightexam as well as the PET. Such examination by using unified proposition, unifiedorganization way, well guarantee the credibility and comparability of the corpus, thecoverage scale corpus has the very good representative. These several corpora areaccording to the different language level or grade as a standard collection ofsynchronic corpus, and use of the corpus, the domestic scholars carried out ahorizontal contrast or error analysis aided by computer or contrastive studies oninterlanguage both at home and abroad.

1.2 Significance of the Present Study研究意义

Generally speaking, the acquisition of grammatical items is always regarded asthe difficult part for Chinese EFL learners. The author of this thesis has noticedthrough her own teaching experience as a university English teacher for more than 14years that the acquisition and use of English Subjunctive Mood (SM) is a very hardnut to crack for Chinese EFL learners and an important grammatical item, whichappears in various types of domestic national English examinations, CET Band Four,Band Six and Postgraduate Entrance Examination, etc.. Many studies revealed that themisuse of SM occupies a large proportion of the grammatical errors committed bySecond Language Learners (SLL). Therefore, conducting an in-depth investigationinto the acquisition and the use of English subjunctive mood is of great significance,aiming to shed light on the scientific and rational acquisition and giving someconstructive suggestion on the countermeasures of learning and teaching method ofthe Subjunctive Mood (SM).A number of researches have been made on the origin, structures and functions ofSM, yet the empirical researches on this grammatical item are few and far fromenough. With the aid of corpus, the author of the thesis explored how the Chinese EFLlearners acquired this grammatical item.The purpose of this corpus-based comparative study in the first part of thedissertation of the Chinese EFL learners from the perspective of SLA, which isconducted on the basis of the CLEC and the LOCNESS, is to:1) investigate the acquisition of SM by Chinese EFL learners;2) study the use differences of SM by native speakers and non-native speakersand th本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。