な-adjectives are adjectives that do not end in い in their dictionary form, such as きれい (clean/pretty), しずか (quiet), and べんり (convenient). When a な-adjective comes before a noun, you add な. When it ends a sentence, you use です for politeness. Key points: • Add な before a noun: きれいな部屋 • Add です at the end for a polite sentence: きれいです • Many な-adjectives end in い, but they are not い-adjectives (きれい, きらい) • Use the same form for present descriptions For example, “この部屋は静かです” means “This room is quiet.” If you place the adjective before a noun, you say “静かな部屋” (a quiet room). A common beginner mistake is forgetting な before the noun. Remember: if the adjective is a な-adjective, insert な when it modifies a noun. Use な-adjectives just like い-adjectives for descriptions, but pay attention to the な link before nouns. This makes your sentences clear and natural.