Explanation
Express a negative conjecture or determination; 'probably not' or 'I will not'.
Formation
Verb-dictionary form + まい
Detailed explanation
The ～まい grammar point is used to express a negative conjecture or a strong determination not to do something. In modern usage, it is generally used with the dictionary form of verbs (来る→来るまい, する→するまい, etc.). It can be translated as 'probably not' or 'I will not' in English.
Examples
彼は今晩来るまい。
Kare wa konban kuru mai.
He probably won't come tonight.
こんなに遅れては、電車に間に合うまい。
Konnani okurete wa, densha ni maniau mai.
Being this late, I probably won't make it for the train.
あの人は絶対に忘れるまい。
Ano hito wa zettai ni wasureru mai.
That person will definitely not forget.
私は二度とその失敗を繰り返すまい。
Watashi wa nidoto sono shippai o kurikaesu mai.
I will not repeat that mistake again.
Practice
Grammar content sourced from hanabira.org.