JLPT N4 · Permission and obligation

〜てはいけない

Must not, is not allowed

Meaning

Used for prohibition or a strict rule.

Formation

  1. て form + はいけない — 走ってはいけない
  2. Colloquial contraction: ては → ちゃ, では → じゃ

When to use it

Core use
Must not, is not allowed

Examples

20 sentences
  • 試験しけんのときは辞書じしょを使っつかってはいけない

    You must not use a dictionary during the exam.

  • この川かわで泳いおよいではいけない

    You must not swim in this river.

  • 人ひとのパンを勝手かってに食べたべてはいけない

    You must not eat someone else’s bread without asking.

  • 夜よる遅くおそくコーヒーを飲んのんではいけない

    You must not drink coffee late at night.

  • 会議中かいぎちゅうにスマホを見みてはいけない

    You must not look at your phone during the meeting.

  • 展示品てんじひんに触っさわってはいけません

    You must not touch the exhibits.

  • ここに車くるまを止めとめてはいけません

    You must not park a car here.

12 more examples
  • 子どもこどもだけで川かわに入っはいってはいけません

    Children must not enter the river by themselves.

  • 人ひとの秘密ひみつを話しはなしてはいけません

    You must not reveal another person's secrets.

  • ここでたばこを吸っすってはいけません

    You must not smoke here.

  • このボタンを押しておしてはいけません

    You must not press this button.

  • 授業中じゅぎょうちゅうに寝ねてはいけません

    You must not sleep during class.

  • 夜よるに大きなおおきな音おとを出してだしてはいけません

    You must not make loud noises at night.

  • 美術館びじゅつかんで写真しゃしんを撮ってとってはいけません

    You must not take photos in the art museum.

  • この水みずを飲んのんではいけません

    You must not drink this water.

  • 図書館としょかんで大きなおおきな声こえで話してはなしてはいけません

    You must not talk loudly in the library.

  • パスワードを人ひとに教えておしえてはいけません

    You must not tell other people your password.

  • 大事なだいじな手紙てがみを捨ててすててはいけません

    You must not throw away important letters.

  • 教室きょうしつでご飯ごはんを食べてたべてはいけません

    You must not eat in the classroom.

Important notes

  • This construction expresses a prohibition or rule.

Common mistakes

  • Do not confuse 行ってはいけない (must not go) with 行かなくてもいい (need not go).

Check yourself

Pick the translation of each sentence. The wrong options translate similar patterns, so watch the grammar rather than the words.

  1. Sentence 1: 子どもこどもだけで川かわに入っはいってはいけません

  2. Sentence 2: 美術館びじゅつかんで写真しゃしんを撮ってとってはいけません

  3. Sentence 3: 教室きょうしつでご飯ごはんを食べてたべてはいけません

Similar grammar

    Hear it in podcasts

    The pattern appears in these episodes. They open in the app with the transcript and translation.

    The trainer requires a free account. Examples and practice questions on this page are available without signing up.

    All N4 grammarPractise in the app