
(Joy in a library [Shizuka desu] vs. Joy pointing to a quiet house [Shizuka na ie])
“This room is quiet.” (Kono heya wa shizuka desu.)
“This is a quiet room.” (Kore wa shizuka na heya desu.)
Why does the second one have “Na”? This is the most important rule for **Na-Adjectives**. Let’s master it with Joy and Ken!
🗣 Conversation Scene
Joy is looking for a new apartment.
Joy
私は 静か(しずか) ところに 住(す)みたいです。
このアパートは 静かな(しずかな) ですか?
(I want to live in a “quiet” place. Is this apartment “quiet”?)
このアパートは 静かな(しずかな) ですか?
(I want to live in a “quiet” place. Is this apartment “quiet”?)
Ken
惜(お)しい!
「静か な ところ」と「静か です」が正解(せいかい)ですよ。
(So close! “Shizuka NA tokoro” and “Shizuka desu” are correct.)
「静か な ところ」と「静か です」が正解(せいかい)ですよ。
(So close! “Shizuka NA tokoro” and “Shizuka desu” are correct.)
💡 Explanation
Think of “Na” as glue. You need glue to stick the adjective to a noun.
Point 1: [Adjective] + [Noun] = Need “NA”
When “Shizuka” comes before a noun (Person, Place, Thing), you must add “Na”.
- 静か な 部屋(へや)
(Quiet room) - 静か な 人(ひと)
(Quiet person)
Point 2: [Adjective] + Desu = NO “Na”
When “Shizuka” is at the end of the sentence (before Desu/Da), you do NOT use “Na”.
- この部屋は 静か です。
(This room is quiet.) - 彼は 静か でした。
(He was quiet.)
📊 Comparison Table
🚧 Joy’s Mistake
(Describing her room)
❌ Wrong: 私の部屋は 静かな です。
(Do not put “Na” before “Desu”!)
✅ Right: 私の部屋は 静か です。
(Simple and correct.)
🔥 Practice Quiz
Tap to check the answer!
Keep practicing with JPLT!



