could supervene
Verbe régulier : supervene - supervened- supervened

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could supervene
you could supervene
she could supervene
we could supervene
you could supervene
they could supervene 	I could be supervening
you could be supervening
she could be supervening
we could be supervening
you could be supervening
they could be supervening	I could have supervened
you could have supervened
she could have supervened
we could have supervened
you could have supervened
they could have supervened	I could have been supervening
you could have been supervening
she could have been supervening
we could have been supervening
you could have been supervening
they could have been supervening	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't supervene
you couldn't supervene
she couldn't supervene
we couldn't supervene
you couldn't supervene
they couldn't supervene 	I couldn't be supervening
you couldn't be supervening
she couldn't be supervening
we couldn't be supervening
you couldn't be supervening
they couldn't be supervening	I couldn't have supervened
you couldn't have supervened
she couldn't have supervened
we couldn't have supervened
you couldn't have supervened
they couldn't have supervened	I couldn't have been supervening
you couldn't have been supervening
she couldn't have been supervening
we couldn't have been supervening
you couldn't have been supervening
they couldn't have been supervening	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I supervene?
could you supervene?
could she supervene?
could we supervene?
could you supervene?
could they supervene? 	could I be supervening?
could you be supervening?
could she be supervening?
could we be supervening?
could you be supervening?
could they be supervening? 	could I have supervened?
could you have supervened?
could she have supervened?
could we have supervened?
could you have supervened?
could they have supervened? 	could I have been supervening?
could you have been supervening?
could she have been supervening?
could we have been supervening?
could you have been supervening?
could they have been supervening? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I supervene?
couldn't you supervene?
couldn't she supervene?
couldn't we supervene?
couldn't you supervene?
couldn't they supervene? 	couldn't I be supervening?
couldn't you be supervening?
couldn't she be supervening?
couldn't we be supervening?
couldn't you be supervening?
couldn't they be supervening? 	couldn't I have supervened?
couldn't you have supervened?
couldn't she have supervened?
couldn't we have supervened?
couldn't you have supervened?
couldn't they have supervened? 	couldn't I have been supervening?
couldn't you have been supervening?
couldn't she have been supervening?
couldn't we have been supervening?
couldn't you have been supervening?
couldn't they have been supervening?