Japanese phrase
___てはいけません。 ___ te wa i ke ma se n
Meaning
You may not ___.
When to use it
Says that an action is forbidden. It sounds firm but is still polite and commonly appears in rules, instructions, and everyday warnings.
Example dialogue
この部屋に入ってもいいですか？ ko no heya ni hai tte mo i i de su ka
May I enter this room?
この部屋に入ってはいけません。 ko no heya ni hait te wa i ke ma se n
You may not enter this room.