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Modal : no | may | might | can | could | shall | should | will | would | must | ought to

Conjugación del verbo inglés MUST HAPPEN

Verbo regular: happen - happened - happened


Afirmación

Forma simple
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it must happen
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Forma con V-ing
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it must be happening
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Perfecto
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it must have happened
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Perfecto con V-ing
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it must have been happening
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Negación

Forma simple
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it must not happen
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Forma con V-ing
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it must not be happening
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Perfecto
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it must not have happened
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Perfecto con V-ing
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it must not have been happening
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Forma interrogativa

Forma simple
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must it happen?
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Forma con V-ing
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must it be happening?
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Perfecto
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must it have happened?
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Perfecto con V-ing
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must it have been happening?
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Forma interro-negativa

Forma simple
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must it not happen?
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Forma con V-ing
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must it not be happening?
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Perfecto
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must it not have happened?
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Perfecto con V-ing
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must it not have been happening?
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