じゃない
maybe; most likely; confirmation of information; express surprise towards listener
JLPT
N5
結構
Na・N + じゃない
意義
It expresses a negative meaning when spoken with a rising tone, or an affirmative meaning when spoken with a descending tone.
This is an informal way of saying 「ではない」. Used in spoken language, both males and females use it.
This is an informal way of saying 「ではない」. Used in spoken language, both males and females use it.
山田君
?
いや
,
山田
じゃない
。
Mr. Yamada? No, not Yamada.
山田君
じゃない
?
ええ
、
山田
よ
。
Isn't it Yamada-kun? Yes, Yamada.
あら
、
雨
じゃない
。
Oh, it's not raining.
