〜に違いない ni chigainai

〜に違いない(ni chigainai)means “must be; I'm sure that; no doubt”. Expresses the speaker's strong conviction that something is surely the case, based on evidence or reasoning. Formation: V/Aい(普通形)+に違いない;Aな・N(+である)+に違いない

must be; I'm sure that; no doubt

N3

Formation

V/Aい(普通形)+に違いない;Aな・N(+である)+に違いない

Explanation

Expresses the speaker's strong conviction that something is surely the case, based on evidence or reasoning. Much more certain than でしょう or かもしれない.

Examples

電気が消えているから、彼はもう寝ているに違いない
でんきがきえているから、かれはもうねているにちがいない。
The lights are off, so he must already be asleep.
この字を見れば、書いたのは先生に違いない
このじをみれば、かいたのはせんせいにちがいない。
Looking at this handwriting, it must have been the teacher who wrote it.

Note

Used for the speaker's own inference, not for stating objective facts. A more casual conversational equivalent is に決まっている.

FAQ

〜に違いない — what does it mean and how is it used?

must be; I'm sure that; no doubt. Expresses the speaker's strong conviction that something is surely the case, based on evidence or reasoning. Much more certain than でしょう or かもしれない.

〜に違いない — how do you form it?

V/Aい(普通形)+に違いない;Aな・N(+である)+に違いない

〜に違いない — any usage notes?

Used for the speaker's own inference, not for stating objective facts. A more casual conversational equivalent is に決まっている.

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