【摘要】 本文从对外汉语教学视角出发，针对目前汉语本体研究中具有争议性的语法项目教学，以“没”作为否定动词时是否与“了”共现为例，从争议性语法项目教学内容的真实性、规则的常态与例外、以教学为出发点和目标等三个方面，提出了争议性语法项目的三项教学原则：“尊重原始语言事实”的原则；“多数为主，分清主次”的原则，“基于教学，回归教学”的原则。并进一步探讨如何在这些原则的指导下进行教学实践，以帮助一线教师在面对争议性语法项目进行选择与教学时有所依据，同时也能为语法教学与教材编写提供一定的参考。更多还原

【Abstract】 The thesis proposed three principles on Disputed Grammatical Items in TCSL by taking the example of whether Chinse negative adverb "mei" and auxiliary word "le" can coexist, from three perspectives : the authenticity of teaching content, The normality and exception of rules and the teaching base and aim of disputed grammar items. These principles(to respect the fact of language, to choose main usages and from teaching back to teaching)can help teachers in classroom grasping the basic rules to deal with the disputed grammatical items, guiding teaching practice and can also help providing some references for relevant studies.更多还原