It is frequently considered that grammar and communication are two opposite extremes, and they are less likely to be compatible with each other. Native speakers of any language, however, can understand or produce their mother tongue because they know the grammar of the language subconsciously. This fact leads us to realize that learning grammar is indispensable in acquiring communicative competence. The problem is that the grammar rules which have been employed in Japanese English education, especially in senior high school, are not necessarily effective in the EFL context. Thus "traditional school grammar" should be modified as soon as possible. Langacker's cognitive grammar, the author believes, will surely fill the need to develop a new learning grammar. In this paper, as for the grammar of nouns and verbs, Langacker's theory will be introduced. The author will then go on to discuss some examples of applying Langacker's theory in the classroom