Bestätigung
Einfache Form
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it could freeze
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Form mit V-ing
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it could be freezing
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Perfekt
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it could have frozen
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Perfekt mit V-ing
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it could have been freezing
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Negation
Einfache Form
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it could not freeze
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Form mit V-ing
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it could not be freezing
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Perfekt
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it could not have frozen
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Perfekt mit V-ing
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it could not have been freezing
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Fragende Form
Einfache Form
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could it freeze?
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Form mit V-ing
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could it be freezing?
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Perfekt
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could it have frozen?
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Perfekt mit V-ing
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could it have been freezing?
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Fragende Negation Form
Einfache Form
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could it not freeze?
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Form mit V-ing
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could it not be freezing?
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Perfekt
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could it not have frozen?
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Perfekt mit V-ing
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could it not have been freezing?
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