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Grammar Book

GrammarBook N4 : Noun + のとき (When)

  • 24 Apr, 2026
  • Com 0

N4-G-004

Noun + のとき (When)

Core / Life stage & Situations

👀 Layer A: Visual Guide (直感理解)

📝 Quick Summary (まとめ)

「こどものとき」や「びょうきのとき」のように、名詞(めいし)を使って特定の時間(じかん)や状況(じょうきょう)を表します。名詞(めいし)と「とき」の間(あいだ)には、必(かなら)ず「の」を入れます。
Use this to refer to specific periods or states using nouns (e.g., “when I was a child”, “when sick”). Always include the particle “no” between the noun and “toki”.

Structure: [Noun] + の + とき、[Main Sentence].
Example: びょうきの とき、おゆを のみます (When sick, I drink hot water).

🔗 Connected Grammar (関連文法):

  • N4-G-002: Verb (dict form) + とき
  • N4-G-003: Vない / いAdj / なAdj + とき

🔍 Layer B: Deepening (深掘り)

💡 Raya’s Hack (攻略法)

「ライフステージ」を言ってみよう!
面接(めんせつ)や自己紹介(じこしょうかい)でよく使うフレーズです。
* **しょうがくせいの** とき (When in elementary school)
* **ちゅうがくせいの** とき (When in junior high school)
* **こうこうせいの** とき (When in high school)
* **だいがくせいの** とき (When a university student)
学生(がくせい)の種類の後ろに「のとき」をつけるだけで、昔の話がスムーズにできます!

This is very useful for interviews or self-introductions when talking about your school days. Simply add “no toki” after the type of student you were.

🚧 Joy’s Mistake (よくある間違い)

Scene: Joy remembers his childhood favorites.

Joy: 「こどもとき、ケーキが 大好きでした。」
(Kodomo toki, keeki ga daisuki deshita.)

❌ Missing Particle!

Why?

名詞(めいし)と「とき」を直接(ちょくせつ)つなぐことはできません。必ず「の」を入れましょう。
× こども とき
〇 こどもの とき

You cannot skip the particle “no” when connecting a noun to “toki”. It must be “Noun + NO + toki”.

🔥 Layer C: Practice Loop

Now it’s time to test your learning through the next 10 practice drills!

Level 1: Connect to “Toki”

Q1. When I was a child (こども)
答え: こどもの とき
Q2. When I was a student (がくせい)
答え: がくせいの とき
Q3. When sick (びょうき)
答え: びょうきの とき
Q4. When on holiday/day off (やすみ)
答え: やすみの とき
Q5. When I was in high school (こうこう)
答え: こうこうの とき

Level 2: Full Sentences

Q6. When I was a child, I often played soccer.
答え: こどもの とき、よく サッカーを しました。
Q7. When I was a university student, I lived in Tokyo.
答え: だいがくせいの とき、とうきょうに すんで いました。
Q8. When you are sick, please rest.
答え: びょうきの とき、やすんで ください。
Q9. What do you do when you have a day off?
答え: やすみの とき、何を しますか?
Q10. I was thin when I was in high school.
答え: こうこうの とき、やせて いました。

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Related posts:

GrammarBook N4 : いくらですか (How much?) GrammarBook N4 : Verb(dict form)+とき (When) GrammarBook N4 : Vない / いAdj / なAdj + とき GrammarBook N5: The Particle が (identifier/existence marker)
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GrammarBook N4 : Vない / いAdj / なAdj + とき
GrammarBook N4 : Verb(dict) + と (If/When - Automatic)
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