パターン
Verb-casual + かもしれない, i-Adjective + かもしれない, na-Adjective + だかもしれない, Noun + だかもしれない
Verb-casualThe casual form of a verb is used before ~かもしれない.
例: 降る (furu) - to rain
i-AdjectiveAn i-adjective directly followed by ~かもしれない expresses uncertainty about the quality.
例: 美味しい (oishii) - delicious
na-Adjective + だA na-adjective is used with だ before ~かもしれない, but in casual speech, だ can be omitted.
例: 静か (shizuka) - quiet
NounA noun requires だ before ~かもしれない, although this can be dropped in informal contexts.
例: 学生 (gakusei) - student