GrammarJLPT N4
must be
Expression

Definitions

  1. 1. must be
  2. 2. there's no doubt that
  3. 3. surely
A grammar pattern meaning "must be" or "there is no doubt that," used to express strong certainty or conviction about something. The speaker uses it when they are very confident in their conclusion based on evidence or reasoning.

Grammar

Grammar lesson content not found for this point.

Example sentences

Sentence 1

Looking at that expression, the results must not be good!

Sentence 2

She must be laughing that hard to hide how nervous she is.

Sentence 3

When I asked "Tanaka isn't coming?", they said, "He must have forgotten."

Sentence 4

Don't give me that look — I'm obviously going to think you messed up!

Sentence 5

If it's that cheap, there must be some reason why!