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 could not happen
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Forme en V-ing
--
it could not be happening
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Perfect
--
it could not have happened
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Perfect en V-ing
--
it could not 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
--
could it not happen?
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Forme en V-ing
--
could it not be happening?
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Perfect
--
could it not have happened?
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Perfect en V-ing
--
could it not have been happening?
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