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Grammar Book

GrammarBook N5: ~たいです

  • 10 Jan, 2026
  • Com 0
N5-G-028

~たいです (I want to…)

Supporting / Adjectives

👀 Layer A: Visual Guide (直感理解)

📝 Quick Summary (まとめ)

「何かをしたい(願望)」という気持ちを伝える表現です。
作り方は簡単。「ます形」の「ます」を取って、「たい」を付けます。
Use this pattern to express what you WANT to do. Remove “masu” from the verb and add “tai”. Note: Grammatically, it functions as an i-Adjective!

Structure: [Verb Stem] + たい です (tai desu).

🔗 Connected Grammar (関連文法):

  • N5-G-020: い-Adjectives (Tai behaves like this!)

🔍 Layer B: Deepening (深掘り)

💡 Raya’s Hack (攻略法)

「たい」は「い形容詞」の変装(へんそう)だ!
「行きたい」「食べたい」… ほら、最後に「い」があるでしょ?
だから否定(ひてい)する時は、い形容詞のルールを使うんだ。
× 食べたいません
〇 食べたくない です (おいしくない と同じ!)

“Tai” is actually an i-Adjective in disguise! It ends with “i”. So for negative, use the i-Adjective rule: Drop “i” and add “kunai”. “Tabeta-kunai” (just like Oishi-kunai).

🚧 Joy’s Mistake (よくある間違い)

Scene: Joy says he doesn’t want to go.

Joy: 「行きたい ません!」
(Ikitai masen!)

❌ Wrong!

Why?

「たい」は動詞ではありません!形容詞です。「ません」は使えません。
い形容詞の否定「くない」を使いましょう。
正解は「行きたくない です」です。

“Tai” is not a verb anymore; it’s an adjective! You cannot use “masen”. Use “kunai” instead. Correct: “Ikita-kunai desu”.

🔥 Layer C: Practice Loop

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

Level 1: I want to…

Q1. Tabemasu (Eat) → “I want to eat.”
答え: 食べたい です。 (Tabetai desu.)

(Drop masu, add tai)

Q2. Ikimasu (Go) → “I want to go.”
答え: 行きたい です。 (Ikitai desu.)

(Drop masu, add tai)

Q3. Mimasu (Watch) → “I want to watch.”
答え: 見たい です。 (Mitai desu.)

(Drop masu, add tai)

Q4. Nomimasu (Drink) → “I want to drink.”
答え: 飲みたい です。 (Nomitai desu.)

(Drop masu, add tai)

Q5. Shimasu (Do) → “I want to do (play) soccer.”
答え: サッカーが したい です。 (Sakkaa ga shitai desu.)

(Drop masu, add tai. *Particle O can change to GA*)

Level 2: Negative (I don’t want to…)

Q6. Taberru (Eat) → “I don’t want to eat.”
答え: 食べたくない です。 (Tabetakunai desu.)

(Tabetai -> Drop i -> Add kunai)

Q7. Iku (Go) → “I don’t want to go.”
答え: 行きたくない です。 (Ikitakunai desu.)

(Ikitai -> Ikitakunai)

Q8. Benkyou suru (Study) → “I don’t want to study.”
答え: 勉強 したくない です。 (Benkyou shitakunai desu.)

(Shitai -> Shitakunai)

Q9. Translate: “I want to return home.” (Uchi, Kaeru)
答え: うちへ 帰りたい です。 (Uchi e kaeritai desu.)

(Kaeri-masu -> Kaeri-tai)

Q10. Translate: “What do you want to drink?”
答え: 何を 飲みたい ですか? (Nani o nomitai desu ka?)

(Question form)

Related posts:

GrammarBook N5 : AはBです (A is B) GrammarBook N5: The Particle は (topic marker) GrammarBook N5: The Particle も (also) GrammarBook N5: い-adjectives
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