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Grammar Book

GrammarBook N5: ~前に / ~後で (Before/After)

  • 29 Jan, 2026
  • Com 0
N5-G-046

~前に / ~後で (Before / After)

Supporting / Sequence

👀 Layer A: Visual Guide (直感理解)

📝 Quick Summary (まとめ)

行動の順番(じゅんばん)を説明する表現です。「Aをする前にBをする」「Aをした後でBをする」と言いたいときに使います。動詞の形に注意が必要です。
Use these patterns to describe the order of actions (“Before doing X…”, “After doing Y…”). Pay attention to the verb forms!

Before: [Verb Dictionary] + 前に (mae ni)
After: [Verb TA-form] + 後で (ato de)

🔗 Connected Grammar (関連文法):

  • N5-G-047: ~てから (After/Since – Sequence)
  • N5-G-050: Plain Past Form (Ta-form used for “Ato de”)

🔍 Layer B: Deepening (深掘り)

💡 Raya’s Hack (攻略法)

「前は辞書、後はタ形」!
このリズムで覚えちゃおう!
* **~前に (Before):** まだしていないから「辞書形(原形)」。(食べる 前に)
* **~後で (After):** もう終わったことだから「タ形(過去)」。(食べた 後で)
名詞のときは、どちらも「の (NO)」をつけるだけ! (食事の 前に / 食事の 後で)

Memorize the rhythm: “Dictionary before Mae, TA before Ato”. “Before” is potential (Dictionary form). “After” is completed (TA form). For Nouns, just add “NO” (Noun + no + mae ni / ato de).

🚧 Joy’s Mistake (よくある間違い)

Scene: Joy washes his hands before eating.

Joy: 「ご飯を 食べた 前に 手を洗います。」
(Gohan o tabeta mae ni te o araimasu.)

❌ Time Paradox!

Why?

「食べた(過去)」のに「前に(Before)」というのは矛盾(むじゅん)しています。「前に」の前は必ず「辞書形(食べる)」です。
正解は「ご飯を 食べる 前に」です。

You can’t say “Before I ate”. “Mae ni” implies the action hasn’t happened yet relative to the main verb. Always use the Dictionary Form: “Taberu mae ni”.

🔥 Layer C: Practice Loop

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

Level 1: Verb Connection

Q1. Before sleeping (Neru)…
答え: 寝る 前に (Neru mae ni)

(Dictionary form)

Q2. After eating (Taberu)…
答え: 食べた 後で (Tabeta ato de)

(TA form)

Q3. Before buying (Kau)…
答え: 買う 前に (Kau mae ni)

(Dictionary form)

Q4. After watching (Miru)…
答え: 見た 後で (Mita ato de)

(TA form)

Q5. After working (Hataraku)…
答え: 働いた 後で (Hataraita ato de)

(TA form)

Level 2: Nouns & Sentences

Q6. Before the meal (Shokuji)…
答え: 食事の 前に (Shokuji no mae ni)

(Noun + NO + mae ni)

Q7. After work (Shigoto)…
答え: 仕事の 後で (Shigoto no ato de)

(Noun + NO + ato de)

Q8. Translate: “I study before I sleep.” (Neru, Benkyou suru)
答え: 寝る 前に 勉強します。

(Neru mae ni benkyou shimasu.)

Q9. Translate: “I will go out after I finish the report.” (Owaru, Dekakemasu)
答え: レポートが 終わった 後で 出かけます。

(Owatta ato de dekakemasu.)

Q10. Translate: “I brushed my teeth after dinner.” (Bangohan, Ha o migakimashita)
答え: 晩ご飯の 後で 歯を 磨きました。

(Bangohan no ato de…)

Related posts:

GrammarBook N5 : AはBです (A is B) GrammarBook N5: The Particle も (also) GrammarBook N5: い-adjectives GrammarBook N5: ~たいです
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GrammarBook N5: ~ないでください
GrammarBook N5: ~てから (The strict sequence)
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