〜に決まっている ni kimatte iru
〜に決まっている(ni kimatte iru)means “surely ~; bound to be ~; must be ~”. Expresses the speaker's strong conviction that something is certainly the case, based on common sense or strong belief, leaving no room for doubt. Formation: V/Aい/Aな/N(普通形)+ に決まっている ※なAだ・Nだの「だ」は取る
surely ~; bound to be ~; must be ~
N3Formation
V/Aい/Aな/N(普通形)+ に決まっている ※なAだ・Nだの「だ」は取る
Explanation
Expresses the speaker's strong conviction that something is certainly the case, based on common sense or strong belief, leaving no room for doubt.
Examples
Note
Subjective certainty, not objective proof. With na-adjectives and nouns, drop だ before に決まっている. Casual; not for polite proposals.
FAQ
〜に決まっている — what does it mean and how is it used?
surely ~; bound to be ~; must be ~. Expresses the speaker's strong conviction that something is certainly the case, based on common sense or strong belief, leaving no room for doubt.
〜に決まっている — how do you form it?
V/Aい/Aな/N(普通形)+ に決まっている ※なAだ・Nだの「だ」は取る
〜に決まっている — any usage notes?
Subjective certainty, not objective proof. With na-adjectives and nouns, drop だ before に決まっている. Casual; not for polite proposals.