Conjugaison du verbe anglais COULD HAPPEN
Verbe régulier : happen - happened - happened
Traduction française : arriver - se passer
Affirmation
Forme simple
--
it could happen
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Forme en V-ing
--
it could be happening
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Perfect
--
it could have happened
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Perfect en V-ing
--
it could have been happening
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Négation
Forme simple
--
it couldn't happen
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Forme en V-ing
--
it couldn't be happening
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Perfect
--
it couldn't have happened
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Perfect en V-ing
--
it couldn't have been happening
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Forme interrogative
Forme simple
--
could it happen?
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Forme en V-ing
--
could it be happening?
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Perfect
--
could it have happened?
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Perfect en V-ing
--
could it have been happening?
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Forme interro-négative
Forme simple
--
couldn't it happen?
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Forme en V-ing
--
couldn't it be happening?
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Perfect
--
couldn't it have happened?
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Perfect en V-ing
--
couldn't it have been happening?
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