Grammartically speaking, what's the negative form of the modal verb "Must"?

3 Answers

  • Pontus
    Lv 7
    3 weeks ago
    Favorite Answer

    must not 

    You must not go.  

    He must not have done his homework. 

    Although technically, English doesn't have negative forms of verbs.  The negative is indicated by adding the adverb "not".

    Although sometimes "do support" is required for negatives of main verbs, but that's technically the emphatic aspect in the negative.  He does work (affirmative, emphatic).  He doesn't work. (negative, emphatic). 

    Some languages have actual negative forms of verbs (Japanese is an example): 

    miru (see/sees // will see); minai (don't see // doesn't see // won't see).

    tabemasu (eat/eats/ will eat); tabemasen (don't/doesn't eat / won't eat)


    Source(s): studied linguistics and English grammar; native English speaker.
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  • 3 weeks ago

    There are no negative verb forms in English.  There's only the prefix "un", used to show reversal of what's already been done.

  • Lôn
    Lv 7
    3 weeks ago

    Must not = mustn't.

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