克拉申外语教学理论在各国颇有影响,本文就其“输入说”从定义、论据和推断三个方面进行讨论,认为其语法规则习得即语言习得的观点不正确,并对“输入说”的两条主要论据“简化语言”和“沉默期”的成立与否加以分析。 Krashen’s theory of foreign language teaching is quite influential in all countries. This paper discusses three aspects of his “input theory” from the aspects of definition, argument and reasoning, and holds that his grammatical rules acquisition is not correct in terms of language acquisition. The two main arguments “simplified language” and “silent period” of the establishment or not to be analyzed.