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GrammarJLPT N3
must not
Expression

Definitions

  1. 1. must not
A grammatical pattern used to express a strong prohibition, meaning "must not" or "should never." It is more formal and emphatic than simply saying してはいけない, and is often found in rules, laws, or serious warnings.

Grammar

Grammar lesson content not found for this point.

Example sentences

Sentence 1

I told you — no eating snacks before dinner!

Sentence 2

Can't you see the label? It says do not open that box.

Sentence 3

Even if you're right, you must not say it in a way that hurts people.

Sentence 4

You must never walk away and leave the stove on!

Sentence 5

Even if you think you can win, you must not break the rules.