作者：Zhou Houyin
　　【Abstract】Vocabulary instruction is a vital part in English teaching. The paper sorts out four types of errors related to the usage of words based on the analyzing of some college students’ writing assignments. And some suggestions are given based on the analyses on the classroom vocabulary instruction. First， a teacher should design proper tasks in class as well as after class to help students facilitate their vocabulary acquisition. Second， the errors committed by students should be analyzed systematically. The teacher should make students notice their errors and master the usage of these words.
　　【Key Words】Vocabulary Instruction; College English Classroom; Analysis
　　【作者簡介】Zhou Houyin，Wuhan Qingchuan University.
　　Ⅰ.Introduction
　　The study of vocabulary instruction is always a focus of Foreign Language Learning （FLL） because vocabulary and grammar are two basic parts involve in language learning. According to connectionist they are different in terms of to which domain of language knowledge they belong. They thought there is a distinction between higher and lower domains of language knowledge based on the degree of abstractivity of the linguistic units. Grammar belongs to higher level because it is more abstract and lexical units belong to lower level because “it is at this level that linguistic forms are matched with meanings”. Hulstijn also points out that because of their frequency and relative permanency， lexical units are identified automatically by skilled language user （2002）. Learning to recognize spoken and written words is a process that is subject to the power law of practice （Ellis， 2002）. Consequently， memorization and practice play an important role in FLL and vocabulary instruction demands teachers attaching attention to this.
　　In this paper some typical erroneous forms of different types are collected from college students’ writing assignments and analyzed to find out the deep causes underlying these errors. At last some suggestions in relation to vocabulary instruction in college English classroom will be given.
　　1. Data Analysis. Based on the data collected， there are mainly four types of errors related to usage of words. They are 1）. Ill-spelling， 2）. Ill collocation， 3）. Misuse of vocabulary，， and.4）. Confusion of part of speech（The sentences that marked with “*” are ill-formed and the following sentence is corrected one）.
　　（1） Ill-spelling. * It is of great significance for us to develope a good habit of in study It is of great significance for us to develop a good habit in study.