You've learned there are two kinds of adjectives in Japanese, I-adjectives and NA-adjectives. I-adjectives end with the syllable I, such as YASUI "inexpensive." NA-adjectives take NA after them, when ...

Adjectives are divided basically into two kinds, those that end with the syllable I, and those that do not. Those that end with the syllable I are called I-adjectives. They include words like HIROI ...