Let's put your elementary school English skills to the test. What is the correct contraction for the phrase "must not"?
Answer mustn't
The phrase "must not" is often used to indicate that something is forbidden, and the correct contraction is mustn't. If that sounds strange, it's because the word "must" is a modal verb, meaning it doesn't express action like most verbs.
Asked by Rachel Bortles · Last updated 4 years ago · 761.4K views · SOURCE
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