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English verb conjugation MUST FREEZE

Irregular verb: freeze - froze - frozen


Affirmation

Simple form
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it must freeze
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V-ing form
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it must be freezing
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Perfect
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it must have frozen
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V-ing perfect
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it must have been freezing
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Negation

Simple form
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it must not freeze
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V-ing form
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it must not be freezing
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Perfect
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it must not have frozen
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V-ing perfect
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it must not have been freezing
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Interrogative form

Simple form
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must it freeze?
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V-ing form
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must it be freezing?
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Perfect
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must it have frozen?
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V-ing perfect
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must it have been freezing?
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Interro-negative form

Simple form
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must it not freeze?
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V-ing form
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must it not be freezing?
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Perfect
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must it not have frozen?
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V-ing perfect
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must it not have been freezing?
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