〜てもいいです

JLPT N5
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🏛️ Basic Structure

[Verb in て-form] + もいいです It's okay to... / You may...

📋 Grammar Details

Part of Speech
-
Word Type
-
Politeness Level
-

📝 Explanation

🔧 Structure

To say someone is allowed or it’s okay to do something, take the verb in て-form and add もいいです:

[Verb in て-form] + もいいです (It’s okay to… / You may…)

❓ Asking for Permission

  • Just turn the phrase into a question by adding :
  • [Verb in て-form] + もいいですか?
    This is like saying “Is it alright if I…?” or “May I…?”
  • トイレに行ってもいいですか?
    May I go to the bathroom?
  • ちょっと休んでもいいですか。
    May I take a short break?

🗣️ How to Reply

If someone asks for permission with 〜てもいいですか, here’s how you can answer:

  • Polite, normal:
    • はい、いいですよ。 – Yes, that’s fine.
    • どうぞ。 – Please, go ahead. (This is a graceful and friendly way to say yes!)
  • 📝 Important: You can’t just reply something like てもいいです without a verb in front.
    Wrong: ❌ てもいいです, ❌ もいいです
    Right: ✅ 座ってもいいです (You may sit.), ✅いいです
  • If you want to be super brief in casual speech, just say:
    うん、いいよ。 – Yeah, that’s fine.
    いいよ。 – Sure.

💡 Notes

  • In casual speech, you can drop the も and say just 〜ていい?
    入っていい? (Can I come in?)
    食べていいです is fine, just like 食べてもいいです
  • Add for encouragement or reassurance:
    使ってもいいですよ! (You can use it, really!)

🚫 Want to say “You must not…”?

  • Use 〜てはいけません (explained in the next post!):
    ➡️ ここでタバコを吸ってはいけません。
    You must not smoke here.

📚 Examples

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