should rain
Regular verb: rain - rained- rained

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