The Conjugator
Conjugação do verbo inglês
COULD HAPPEN

Verbo regular: happen - happened - happened

Afirmação

Forma simple

Forma com V-ing

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

Perfeito

Perfeito com V-ing

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

Negação

Forma simple

Forma com V-ing

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

Perfeito

Perfeito com V-ing

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

Forma interrogativa

Forma simple

Forma com V-ing

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

Perfeito

Perfeito com V-ing

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

Forma interro-Negação

Forma simple

Forma com V-ing

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

Perfeito

Perfeito com V-ing

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