could downgrade
Verbe régulier : downgrade - downgraded- downgraded
Traduction française : dévaloriser - rabaisser 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could downgrade
you could downgrade
he could downgrade
we could downgrade
you could downgrade
they could downgrade 	I could be downgrading
you could be downgrading
he could be downgrading
we could be downgrading
you could be downgrading
they could be downgrading	I could have downgraded
you could have downgraded
he could have downgraded
we could have downgraded
you could have downgraded
they could have downgraded	I could have been downgrading
you could have been downgrading
he could have been downgrading
we could have been downgrading
you could have been downgrading
they could have been downgrading	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't downgrade
you couldn't downgrade
he couldn't downgrade
we couldn't downgrade
you couldn't downgrade
they couldn't downgrade 	I couldn't be downgrading
you couldn't be downgrading
he couldn't be downgrading
we couldn't be downgrading
you couldn't be downgrading
they couldn't be downgrading	I couldn't have downgraded
you couldn't have downgraded
he couldn't have downgraded
we couldn't have downgraded
you couldn't have downgraded
they couldn't have downgraded	I couldn't have been downgrading
you couldn't have been downgrading
he couldn't have been downgrading
we couldn't have been downgrading
you couldn't have been downgrading
they couldn't have been downgrading	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I downgrade?
could you downgrade?
could he downgrade?
could we downgrade?
could you downgrade?
could they downgrade? 	could I be downgrading?
could you be downgrading?
could he be downgrading?
could we be downgrading?
could you be downgrading?
could they be downgrading? 	could I have downgraded?
could you have downgraded?
could he have downgraded?
could we have downgraded?
could you have downgraded?
could they have downgraded? 	could I have been downgrading?
could you have been downgrading?
could he have been downgrading?
could we have been downgrading?
could you have been downgrading?
could they have been downgrading? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I downgrade?
couldn't you downgrade?
couldn't he downgrade?
couldn't we downgrade?
couldn't you downgrade?
couldn't they downgrade? 	couldn't I be downgrading?
couldn't you be downgrading?
couldn't he be downgrading?
couldn't we be downgrading?
couldn't you be downgrading?
couldn't they be downgrading? 	couldn't I have downgraded?
couldn't you have downgraded?
couldn't he have downgraded?
couldn't we have downgraded?
couldn't you have downgraded?
couldn't they have downgraded? 	couldn't I have been downgrading?
couldn't you have been downgrading?
couldn't he have been downgrading?
couldn't we have been downgrading?
couldn't you have been downgrading?
couldn't they have been downgrading?