could overgrade
Verbe régulier : overgrade - overgraded- overgraded

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could overgrade
you could overgrade
he could overgrade
we could overgrade
you could overgrade
they could overgrade 	I could be overgrading
you could be overgrading
he could be overgrading
we could be overgrading
you could be overgrading
they could be overgrading	I could have overgraded
you could have overgraded
he could have overgraded
we could have overgraded
you could have overgraded
they could have overgraded	I could have been overgrading
you could have been overgrading
he could have been overgrading
we could have been overgrading
you could have been overgrading
they could have been overgrading	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't overgrade
you couldn't overgrade
he couldn't overgrade
we couldn't overgrade
you couldn't overgrade
they couldn't overgrade 	I couldn't be overgrading
you couldn't be overgrading
he couldn't be overgrading
we couldn't be overgrading
you couldn't be overgrading
they couldn't be overgrading	I couldn't have overgraded
you couldn't have overgraded
he couldn't have overgraded
we couldn't have overgraded
you couldn't have overgraded
they couldn't have overgraded	I couldn't have been overgrading
you couldn't have been overgrading
he couldn't have been overgrading
we couldn't have been overgrading
you couldn't have been overgrading
they couldn't have been overgrading	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I overgrade?
could you overgrade?
could he overgrade?
could we overgrade?
could you overgrade?
could they overgrade? 	could I be overgrading?
could you be overgrading?
could he be overgrading?
could we be overgrading?
could you be overgrading?
could they be overgrading? 	could I have overgraded?
could you have overgraded?
could he have overgraded?
could we have overgraded?
could you have overgraded?
could they have overgraded? 	could I have been overgrading?
could you have been overgrading?
could he have been overgrading?
could we have been overgrading?
could you have been overgrading?
could they have been overgrading? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I overgrade?
couldn't you overgrade?
couldn't he overgrade?
couldn't we overgrade?
couldn't you overgrade?
couldn't they overgrade? 	couldn't I be overgrading?
couldn't you be overgrading?
couldn't he be overgrading?
couldn't we be overgrading?
couldn't you be overgrading?
couldn't they be overgrading? 	couldn't I have overgraded?
couldn't you have overgraded?
couldn't he have overgraded?
couldn't we have overgraded?
couldn't you have overgraded?
couldn't they have overgraded? 	couldn't I have been overgrading?
couldn't you have been overgrading?
couldn't he have been overgrading?
couldn't we have been overgrading?
couldn't you have been overgrading?
couldn't they have been overgrading?