All JLPT grammar
N2

~まい

Express a negative conjecture or determination; 'probably not' or 'I will not'.

At a glance

~まい has two meanings: "I will not ~" (the speaker's firm decision) and "probably not ~" (a guess). It is mostly used in writing and formal speech.

Verb (dictionary form) + まい
る-verb: stem + まい is also used

あの店みせにはもう二度にどと行いくまい。 I will never go to that shop again.


How to form it

Verb group Dictionary form まい form
う-verb 行いく, 飲のむ 行いくまい, 飲のむまい
る-verb 食たべる, いる 食たべまい / 食たべるまい, いまい / いるまい
する する するまい / しまい
来くる 来くる 来くるまい / 来こまい

For nouns and な-adjectives, use ではあるまい: 簡単かんたんではあるまい "It probably isn't easy."

Examples

  • 彼かれは今晩こんばん来くるまい。

    He probably won't come tonight.

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The rest of the lesson

When to use it, common mistakes, nuances and a quick check, with spaced repetition to make it stick.

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