could subvene
Verbo regular: subvene - subvened- subvened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could subvene
you could subvene
he could subvene
we could subvene
you could subvene
they could subvene 	I could be subvening
you could be subvening
he could be subvening
we could be subvening
you could be subvening
they could be subvening	I could have subvened
you could have subvened
he could have subvened
we could have subvened
you could have subvened
they could have subvened	I could have been subvening
you could have been subvening
he could have been subvening
we could have been subvening
you could have been subvening
they could have been subvening	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't subvene
you couldn't subvene
he couldn't subvene
we couldn't subvene
you couldn't subvene
they couldn't subvene 	I couldn't be subvening
you couldn't be subvening
he couldn't be subvening
we couldn't be subvening
you couldn't be subvening
they couldn't be subvening	I couldn't have subvened
you couldn't have subvened
he couldn't have subvened
we couldn't have subvened
you couldn't have subvened
they couldn't have subvened	I couldn't have been subvening
you couldn't have been subvening
he couldn't have been subvening
we couldn't have been subvening
you couldn't have been subvening
they couldn't have been subvening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I subvene?
could you subvene?
could he subvene?
could we subvene?
could you subvene?
could they subvene? 	could I be subvening?
could you be subvening?
could he be subvening?
could we be subvening?
could you be subvening?
could they be subvening? 	could I have subvened?
could you have subvened?
could he have subvened?
could we have subvened?
could you have subvened?
could they have subvened? 	could I have been subvening?
could you have been subvening?
could he have been subvening?
could we have been subvening?
could you have been subvening?
could they have been subvening? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I subvene?
couldn't you subvene?
couldn't he subvene?
couldn't we subvene?
couldn't you subvene?
couldn't they subvene? 	couldn't I be subvening?
couldn't you be subvening?
couldn't he be subvening?
couldn't we be subvening?
couldn't you be subvening?
couldn't they be subvening? 	couldn't I have subvened?
couldn't you have subvened?
couldn't he have subvened?
couldn't we have subvened?
couldn't you have subvened?
couldn't they have subvened? 	couldn't I have been subvening?
couldn't you have been subvening?
couldn't he have been subvening?
couldn't we have been subvening?
couldn't you have been subvening?
couldn't they have been subvening?