English verb conjugation COULD FREEZE
Irregular verb: freeze - froze - frozen
Affirmation
Simple form
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it could freeze
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V-ing form
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it could be freezing
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Perfect
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it could have frozen
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V-ing perfect
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it could have been freezing
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Negation
Simple form
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it couldn't freeze
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V-ing form
--
it couldn't be freezing
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Perfect
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it couldn't have frozen
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V-ing perfect
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it couldn't have been freezing
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Interrogative form
Simple form
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could it freeze?
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V-ing form
--
could it be freezing?
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Perfect
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could it have frozen?
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V-ing perfect
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could it have been freezing?
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Interro-negative form
Simple form
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couldn't it freeze?
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V-ing form
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couldn't it be freezing?
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Perfect
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couldn't it have frozen?
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V-ing perfect
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couldn't it have been freezing?
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