Japanese grammar

What does ~ものではない mean? Japanese grammar N2

~ものではない means should not…; is not something one ought to do.

Quick facts
Level (estimated, JLPT framework)N2
StructureVる + ものではない
Romajimonodehanai
Meaningshould not…; is not something one ought to do

Forming it

Basic form言う → 言うものではない

How to use it

Admonishes based on GENERAL COMMON SENSE and general social norms. The tone of an elder instructing someone younger.

  • 「Vるものではない」 = should not do: 「人の悪口を言うものではない」. It is the negative form of 「~ものだ」 (N2-198, general truth).
  • The basis is social convention, not a specific rule — for specific rules, use 「てはいけない」.
  • Since it carries an instructing tone, it is only used with equals or those younger/lower in status.

Examples

  • One should not speak ill of others.

  • One should not raise one’s voice in public places.

Keep in mind

  • Attaches to the dictionary form.
  • Not used to admonish a superior.

Common mistakes

  • Wrong人(ひと)の悪口(わるぐち)を言(い)ったものではない。

    One should not speak ill of others.

    Correct人(ひと)の悪口(わるぐち)を言(い)うものではない。

    「ものではない」 states a general truth, so it must connect to the DICTIONARY FORM, not the past tense.

  • Wrong部長(ぶちょう)、そんなことを言(い)うものではありません。

    Department head, I think you shouldn't say such things.

    Correct部長(ぶちょう)、そのようなお言葉(ことば)は控(ひか)えられたほうがよろしいかと存(ぞん)じます。

    「ものではない」 has an instructing tone and should not be used toward a superior.

Exam tips

  • 「ものではない」 = should not (general truth); for specific rules use 「てはいけない」.

Related patterns

All N2 grammar →