Must not do with 〜てはだめだ
Saying one must not perform an action is conveyed by a verb in its て form, the particle は, and the adjective だめ (“cannot”, “must not”, “not allowed”), ending in だ.
See also
- To discourage (rather than prohibit) an action, 〜てはいけない is used.
- For an old-fashioned way to strongly forbid an action, 〜べからず is used.
Examples
Further Reading
- Chino, Naoko. "Commands and Prohibitions." Japanese Verbs at a Glance, Kodansha, 2000, pp. 35–36
- Chino, Naoko. "Basic Pattern 27." A Dictionary of Basic Japanese Sentence Patterns, Kodansha, 2000, pp. 193–194
- Kamiya, Taeko. "Commands, Requests, Suggestions, Approval, Disapproval, Prohibition, and Obligation." Japanese Sentence Patterns for Effective Communication, Kodansha, 2005, p. 175