The Conjugator
Coniugazione del verbo inglese
COULD HAPPEN

Verbo regolare: happen - happened - happened

Affermazione

Forma semplice

Forma con V-ing

-
-
it could happen
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-
-		-
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it could be happening
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-
-

Perfetto

Perfetto con V-ing

-
-
it could have happened
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-
-		-
-
it could have been happening
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-
-

Negazione

Forma semplice

Forma con V-ing

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-
it could not happen
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-
-		-
-
it could not be happening
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-
-

Perfetto

Perfetto con V-ing

-
-
it could not have happened
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-
-		-
-
it could not have been happening
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-
-

Forma interrogativa

Forma semplice

Forma con V-ing

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-
could it happen?
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-
-		-
-
could it be happening?
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-
-

Perfetto

Perfetto con V-ing

-
-
could it have happened?
-
-
-		-
-
could it have been happening?
-
-
-

Forma interro-negativa

Forma semplice

Forma con V-ing

-
-
could it not happen?
-
-
-		-
-
could it not be happening?
-
-
-

Perfetto

Perfetto con V-ing

-
-
could it not have happened?
-
-
-		-
-
could it not have been happening?
-
-
-