English verb conjugation WOULD HAPPEN
Regular verb: happen - happened - happened
Affirmation
Simple form
--
it'd happen
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V-ing form
--
it'd be happening
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Perfect
--
it would've happened
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V-ing perfect
--
it would've been happening
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Negation
Simple form
--
it wouldn't happen
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V-ing form
--
it wouldn't be happening
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Perfect
--
it wouldn't have happened
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V-ing perfect
--
it wouldn't have been happening
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Interrogative form
Simple form
--
would it happen?
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V-ing form
--
would it be happening?
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Perfect
--
would it have happened?
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V-ing perfect
--
would it have been happening?
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Interro-negative form
Simple form
--
wouldn't it happen?
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V-ing form
--
wouldn't it be happening?
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Perfect
--
wouldn't it have happened?
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V-ing perfect
--
wouldn't it have been happening?
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