～に決まっている JLPT N2
〜ni kimatte iru
Express certainty; 'it is obvious', 'it must be', 'no doubt'.
Formation
Verb-casual + に決まっている, い-Adjective + に決まっている, な-Adjective + だに決まっている, Noun + だに決まっている
Explanation
The ～に決まっている grammar point is used to express certainty or a strong conviction about a situation or event. It can be translated in English as 'it is obvious', 'it must be', or 'no doubt'. The formation differs depending on whether it is used with a verb, い-adjective, な-adjective, or noun.
Example sentences
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It's obvious that you'll sweat if you exercise on such a hot day.
Konna ni atsui hi ni undou shitara, ase wo kaku ni kimatte iru.
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If he fails the exam, it's obvious he will be disappointed.
Kare ga shiken ni ochitara, gakkari suru ni kimatte iru.
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She's always late, so it's obvious she'll be late today too.
Kanojo wa itsumo okureru kara, kyou mo okureru ni kimatte iru.
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It's obvious that this game is fun.
Kono geemu wa tanoshii ni kimatte iru.