Research Of Biased Errors In "Chufei" Sentence

"Chufei" sentence is very important on teaching Chinese as a foreign language,and in "Chinese level standards and grammar syllabus"(1996) it is Grade C, thatmeans foreign students must to be proficiency, but in the modern Chinese grammardictionary, there are only few dictionary mentioned this kind of sentence, and it’s onlysimple introduction, not in detail. On teaching Chinese as a foreign language,"chufei"sentence did not receive the attention. There are only few words to description, andcan not explain its true meaning and usage.The rate of correct to use this kind ofsentence is not very high, drain use, misuse and other types of errors are common,sometimes the students are not well understood, avoiding the use of is also a recurrentproblem."chufei" in the "Modern Chinese Dictionary" and "Modern Chinese800words"interpreted as "only "and" unless", this essay try to use Pragmatics of Presuppositionprove that the semantics, and try to compare those two meaning, and then analyze thesentence pragmatic functions, collect and analysis4188corpus, and statistics "unless"sentence of four types in the use of modem Chinese frequency.Finally, find the typeof.the biased errors in "chufei" sentence,try to provide recommendations on teachingChinese as a foreign language.