JLPT N3 6 min read Updated May 17, 2026 Grammar pattern

決して~ない(けっして~ない)

never; by no means

Learn how to use 決して~ない(けっして~ない), a JLPT N3 Japanese grammar point meaning never; by no means, with structure, nuance, examples, mistakes, and comparisons.

Meaning
never; by no means
Pattern
決して~ない(けっして~ない)
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JLPT grammar
JLPT
N3

決して~ない(けっして~ない) means never; by no means. It is a JLPT N3 grammar pattern used to strongly deny or emphasize that something is not true.

This grammar point often appears in neutral to formal Japanese. If you want to strongly deny or emphasize that something is not true, 決して~ない(けっして~ない) is a useful pattern to learn.

What does 決して~ない(けっして~ない) mean?

Use 決して~ない(けっして~ない) when you want to strongly deny or emphasize that something is not true.

Natural translations include:

  • never; by no means
  • never
  • never / by no means

How to form 決して~ない(けっして~ない)

決して + Verbない / い-adjectiveくない / な-adjectiveではない / Nounではない

Examples of the pattern:

  • 決して忘れない
  • 決して安くない
  • 決して簡単ではない

When is 決して~ない(けっして~ない) used?

Use 決して~ない(けっして~ない) in situations like:

  • making a strong denial
  • promising not to do something
  • emphasizing that an assumption is wrong

Tone and register:

  • neutral to formal
  • Common in JLPT reading, grammar questions, and natural Japanese sentences

決して~ない(けっして~ない) example sentences

  • この秘密は決して誰にも言いません。 — I will never tell this secret to anyone.
  • 彼の説明は決して間違っていない。 — His explanation is by no means wrong.
  • この問題は決して簡単ではない。 — This problem is by no means easy.
  • 決してあきらめないでください。 — Please never give up.
  • 私は決してあなたを責めているわけではありません。 — I am by no means blaming you.

Nuance of 決して~ない(けっして~ない)

The key nuance is a strong negative emphasis that sounds more forceful than 普通の「ない」.

This matters because 決して~ない(けっして~ない) does more than translate one English phrase. It tells the reader how the speaker is framing the situation, whether as emphasis, contrast, obligation, approximation, or evidence.

For example:

  • In context, it sounds natural when the surrounding sentence supports the nuance.
  • Compared with 絶対に~ない, it has a different focus and level of formality.

決して~ない(けっして~ない) vs 絶対に~ない

Both 決して~ない(けっして~ない) and 絶対に~ない can appear in related situations, but they are different.

決して~ない(けっして~ない):

  • means never; by no means
  • fits the specific N3 pattern and nuance explained above

絶対に~ない:

  • 絶対に~ない is common in speech and strong promises; 決して~ない feels more written, controlled, or emphatic

Quick contrast examples:

  • Target: この秘密は決して誰にも言いません。 — I will never tell this secret to anyone.
  • Compare: Try replacing it with 絶対に~ない and check whether the nuance still matches.

Common mistakes with 決して~ない(けっして~ない)

Watch out for these mistakes:

  • Forgetting the negative ending after 決して
  • Using it for a weak or casual “not really” statement
  • Pairing it with positive verbs unless quoting an unusual style

Is 決して~ない(けっして~ない) on the JLPT?

Yes. 決して~ない(けっして~ない) is commonly taught as JLPT N3 grammar.

That means learners should be able to:

  • recognize it in reading
  • understand its nuance in context
  • use it in simple original sentences

Practice questions for 決して~ない(けっして~ない)

Try making your own sentences with these prompts:

  • Say you will never forget someone’s kindness.
  • Say the plan is by no means impossible.
  • Promise never to tell a secret.

Learning path for 決して~ない(けっして~ない)

To learn 決して~ない(けっして~ない) efficiently, review plain negation first, then practice stronger “no way / cannot” meanings with clear evidence.

  1. First, make sure you can form 決して~ない(けっして~ない) without looking at the pattern chart.
  2. Next, compare it with わけがない, ようがない. These patterns are close enough that choosing between them helps you understand the nuance.
  3. Finally, write sentences where the context proves something is impossible or unlikely; then check whether replacing 決して~ない(けっして~ない) with 切れない(きれない) changes the meaning.
  • わけがない — because it helps separate impossibility, strong negation, and inability.
  • ようがない — because it helps separate impossibility, strong negation, and inability.
  • 切れない(きれない) — because it helps separate impossibility, strong negation, and inability.
  • ないことはない — because it helps separate impossibility, strong negation, and inability.
  • がたい — because it helps separate impossibility, strong negation, and inability.

Learn 決して~ない(けっして~ない) with Hane

If you want to review 決して~ない(けっして~ない) together with the related patterns above, Hane helps you connect grammar, kanji, and vocabulary in short, focused sessions.

Browse more lessons here:

FAQ about 決して~ない(けっして~ない)

What does 決して~ない(けっして~ない) mean in Japanese?

決して~ない(けっして~ない) means “never; by no means” in Japanese. It is an N3 grammar point, and this lesson explains its formation, nuance, example sentences, common mistakes, and similar grammar.

Is 決して~ない(けっして~ない) on the JLPT?

決して~ない(けっして~ない) is taught as N3 Japanese grammar in Hane's grammar lesson archive. Review it with examples, usage notes, and related N3 patterns.

How should I practice 決して~ない(けっして~ない)?

Read several example sentences, identify the form before and after 決して~ない(けっして~ない), then make your own short sentences and compare it with nearby grammar points.

Practice this with Hane
Drill 決して~ない(けっして~ない) until it’s automatic.

Short, focused iOS sessions for grammar, kanji, vocabulary, reading, and JLPT review. Use this lesson with the JLPT prep app and the Japanese learning app overview.

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