Grammar › N3 · 07 Appearance, hearsay & certainty

〜に決まっている: surely; of course it is

N3 · 07 Appearance, hearsay & certainty

Says you are certain that something is true or will happen.

Noun or plain form + に決まっている. Spoken and strong, so it can sound rude. It shows personal certainty, not proof. Stronger than 〜はずだ. The 〜 before it is plain form (na-adj and noun without だ).

Examples

あんなに練習れんしゅうしたんだから、勝かつに決きまっている。

He has practiced so much that he is sure to win.

そんなうまい話うまいはなし、嘘うそに決きまってるよ。

A deal that good has to be a lie.

Study 〜に決まっている in the course →