N2 Grammar ③　に違いない

JLPT N2 Japanese self-study　·　~15 min　·　に違いない vs に決まっている vs はずだ — degrees of certainty

'No contact since morning — she must have already left.' Learn to express certainty precisely, from logical deduction to gut feeling.

What you'll learn

• に違いない: evidence-based certainty (formal, written)
• に決まっている: subjective, gut-feeling certainty (colloquial)
• はずだ: expectation based on reason (medium certainty)
• かもしれない: uncertain possibility (low certainty)

How to study “N2 Grammar ③　に違いない”

“N2 Grammar ③　に違いない” (に違いない vs に決まっている vs はずだ — degrees of certainty) is a JLPT N2 chapter of our free Japanese self-study course, about 15 min. You learn by doing — flashcard drills and fill-in-the-blank quizzes graded on the spot — completely free, with no sign-up and no ad wall. Once it clicks, read the matching in-depth explainer over in Grammar.