English verb conjugation CAN RAIN
Regular verb: rain - rained - rained
Affirmation
Simple form
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it can rain
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V-ing form
--
it can be raining
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Perfect
--
it can have rained
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V-ing perfect
--
it can have been raining
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Negation
Simple form
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it cannot rain
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V-ing form
--
it cannot be raining
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Perfect
--
it cannot have rained
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V-ing perfect
--
it cannot have been raining
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Interrogative form
Simple form
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can it rain?
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V-ing form
--
can it be raining?
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Perfect
--
can it have rained?
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V-ing perfect
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can it have been raining?
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Interro-negative form
Simple form
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can it not rain?
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V-ing form
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can it not be raining?
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Perfect
--
can it not have rained?
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V-ing perfect
--
can it not have been raining?
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