ought to rain
Regular verb: rain - rained- rained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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it ought to rain
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it ought to be raining
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it ought to have rained
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it ought to have been raining
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Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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it ought not to rain
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it ought not to raining
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it ought not to have rained
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it ought not to have been raining
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Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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ought to it rain?
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ought to it be raining?
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ought to it have rained?
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ought to it have been raining?
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Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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ought it not to rain?
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ought it not to be raining?
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ought it not to have rained?
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ought it not to have been raining?
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