Japanese grammar

What does ~ものだ mean? Japanese grammar N2

~ものだ means is supposed to be…; ought to be… (a matter of common sense).

Quick facts
Level (estimated, JLPT framework)N2
StructureVる + ものだ
い形 + ものだ
な形 + な + ものだ
Romajimonoda
Meaningis supposed to be…; ought to be… (a matter of common sense)

Forming it

Advice遊ぶ → 若いうちは遊ぶものだ
General truth守る → 約束は守るものだ

How to use it

States a GENERAL TRUTH that everyone accepts, or gives advice based on that general truth.

  • 「~ものだ」 = it's simply the way things should be: 「約束をしたら守るものだ」 — refers to a general truth, not a specific individual case.
  • The negative form 「~ものではない」 = should not: 「人の悪口を言うものではない」.
  • The same 「ものだ」 also has two other meanings learned at N3: reminiscence 「Vたものだ」 and exclamation 「~ものだ」 (what a…).

Examples

  • If you make a promise, you are supposed to keep it.

  • You should not speak ill of others.

Keep in mind

  • States a general truth, not used for a specific individual case.
  • A na-adjective attaches with 「な」.

Common mistakes

  • Wrong私(わたし)は毎朝(まいあさ)七(なな)時(じ)に起(お)きるものだ。

    I've made it a personal rule to wake up at seven every morning.

    Correct私(わたし)は毎朝(まいあさ)七(なな)時(じ)に起(お)きることにしている。

    For one's own personal habit, use 「ことにしている」; 「ものだ」 states a general truth.

  • Wrong若(わか)いときはよく遊(あそ)んだものではない。

    When I was young, I used to go out a lot.

    Correct若(わか)いときはよく遊(あそ)んだものだ。

    The negative form 「ものではない」 carries an admonishing meaning, not reminiscence.

Exam tips

  • 「ものだ」 = general truth / 「ものではない」 = should not.

Related patterns

All N2 grammar →