Explanation
Express that an action should not be done; 'should not', 'ought not to'.
Formation
Verb-dictionary form + べき + ではない
Detailed explanation
The ～べきではない grammar point is used to indicate that an action is not recommended or should not be done. It can be translated as 'should not' or 'ought not to' in English. The typical formation is “Verb-dictionary form + べきではない.”
Examples
Okureru riyuu ga nai nara, okureru beki dewa arimasen.
If there's no reason to be late, you shouldn’t be late.
Kodomo ni waruguchi o iu beki dewa arimasen.
You shouldn’t say hurtful things to children.
Kono kusuri wa ichido ni nomisugiru beki dewa nai.
You should not take too much of this medicine at once.
Shiranai hito to kojin jouhou o kyouyuu suru beki dewa nai.
You shouldn't share personal information with strangers.
Practice
Grammar content sourced from hanabira.org.