〜てはいけない
〜てはいけない means must not do. It is a JLPT N5 grammar point. "〜てはいけない" says that an action is not allowed. It is often used for rules or manners, and the polite form is "〜てはいけません."
Japanese sources describe it as 「禁止を表す」.
〜てはいけない examples
ここで泳いではいけない。
You must not swim here.
この部屋で食べてはいけない。
You must not eat in this room.
〜てはいけない exercises
Pick what belongs in the parentheses. The answer is marked below.
ここで走って（ ）。
- はいけない ✓
- ください
- います
- あります
You must not run here.
学校でタバコを吸って（ ）。
- ください
- はいけない ✓
- います
- ありました
You must not smoke at school.
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