may, might, perhaps, may be, possibly
Verb or い-Adjective +
Used to express a possibility that something might be true or might happen. It indicates a lower level of certainty than 'probably' (でしょう/だろう).
Verb
The dictionary form or past tense form of a verb is used to indicate a possibility of an action.
明日は雨が降る
It might rain tomorrow.
財布を忘れた
I might have lost my wallet.
い-Adjective
The dictionary form or past tense form of an い-adjective is used to indicate a possibility of a state.
その映画は面白い
The movie might be interesting.
料理は高かった
The food might have been expensive.
In casual conversation,
Noun or な-Adjective +
Used with nouns and な-adjectives to express possibility. Unlike verbs and い-adjectives, the copula だ is omitted in the present tense.
Noun
Nouns are followed directly by
あの人は先生
That person might be a teacher.
彼は学生だった
He might have been a student.
な-Adjective
な-adjective stems are followed directly by
部屋は静か
The room might be quiet.
試験は簡単だった
The test might have been easy.
Do not use だ after a Noun or な-Adjective when followed by