Afirmación
Forma simple
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it may freeze
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Forma con V-ing
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it may be freezing
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Perfecto
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it may have frozen
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Perfecto con V-ing
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it may have been freezing
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Negación
Forma simple
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it may not freeze
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Forma con V-ing
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it may not be freezing
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Perfecto
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it may not have frozen
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Perfecto con V-ing
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it may not have been freezing
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Forma interrogativa
Forma simple
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may it freeze?
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Forma con V-ing
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may it be freezing?
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Perfecto
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may it have frozen?
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Perfecto con V-ing
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may it have been freezing?
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Forma interro-negativa
Forma simple
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may it not freeze?
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Forma con V-ing
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may it not be freezing?
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Perfecto
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may it not have frozen?
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Perfecto con V-ing
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may it not have been freezing?
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