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

Conjugación del verbo inglés CAN HAPPEN

Verbo regular: happen - happened - happened


Afirmación

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

Forma simple
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it can't happen
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Forma con V-ing
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it can't be happening
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Perfecto
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it can't have happened
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Perfecto con V-ing
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it can't have been happening
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Forma interrogativa

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

Forma simple
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can't it happen?
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Forma con V-ing
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can't it be happening?
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Perfecto
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can't it have happened?
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Perfecto con V-ing
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can't it have been happening?
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