〜かもしれない ka mo shire nai
〜かもしれない（ka mo shire nai）means “might; may; perhaps”. Expresses possibility — the speaker thinks something may be true but isn't certain. Formation: V/Aい（普通形）＋かもしれない ／ Aな・N（語幹）＋かもしれない（だ をとる）
might; may; perhaps
N4Formation
V/Aい（普通形）＋かもしれない ／ Aな・N（語幹）＋かもしれない（だ をとる）
Explanation
Expresses possibility — the speaker thinks something may be true but isn't certain. The probability ranges from fairly low to moderate (lower confidence than でしょう). Attaches to plain forms; na-adjectives and nouns drop だ. Polite form: かもしれません.
Examples
Note
Casual spoken form: かも (短縮形). Differs from でしょう, which implies higher confidence.
FAQ
〜かもしれない — what does it mean and how is it used?
might; may; perhaps. Expresses possibility — the speaker thinks something may be true but isn't certain. The probability ranges from fairly low to moderate (lower confidence than でしょう). Attaches to plain forms; na-adjectives and nouns drop だ. Polite form: かもしれません.
〜かもしれない — how do you form it?
V/Aい（普通形）＋かもしれない ／ Aな・N（語幹）＋かもしれない（だ をとる）
〜かもしれない — any usage notes?
Casual spoken form: かも (短縮形). Differs from でしょう, which implies higher confidence.