could rain
Verbo regolare: rain - rained- rained

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
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it could rain
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it could be raining
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it could have rained
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it could have been raining
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Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
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it couldn't rain
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it couldn't be raining
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it couldn't have rained
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it couldn't have been raining
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Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
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could it rain?
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could it be raining?
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could it have rained?
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could it have been raining?
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Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
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couldn't it rain?
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couldn't it be raining?
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-
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couldn't it have rained?
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couldn't it have been raining?
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