can rain
Regular verb: rain - rained- rained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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it can rain
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it can be raining
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it can have rained
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it can have been raining
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Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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it can't rain
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it can't be raining
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it can't have rained
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it can't have been raining
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Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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can it rain?
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can it be raining?
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can it have rained?
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can it have been raining?
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Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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can't it rain?
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can't it be raining?
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can't it have rained?
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can't it have been raining?
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