could center
Verbe régulier : center - centered- centered
Traduction française : (US) centrer - cadrer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could center
you could center
he could center
we could center
you could center
they could center 	I could be centering
you could be centering
he could be centering
we could be centering
you could be centering
they could be centering	I could have centered
you could have centered
he could have centered
we could have centered
you could have centered
they could have centered	I could have been centering
you could have been centering
he could have been centering
we could have been centering
you could have been centering
they could have been centering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't center
you couldn't center
he couldn't center
we couldn't center
you couldn't center
they couldn't center 	I couldn't be centering
you couldn't be centering
he couldn't be centering
we couldn't be centering
you couldn't be centering
they couldn't be centering	I couldn't have centered
you couldn't have centered
he couldn't have centered
we couldn't have centered
you couldn't have centered
they couldn't have centered	I couldn't have been centering
you couldn't have been centering
he couldn't have been centering
we couldn't have been centering
you couldn't have been centering
they couldn't have been centering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I center?
could you center?
could he center?
could we center?
could you center?
could they center? 	could I be centering?
could you be centering?
could he be centering?
could we be centering?
could you be centering?
could they be centering? 	could I have centered?
could you have centered?
could he have centered?
could we have centered?
could you have centered?
could they have centered? 	could I have been centering?
could you have been centering?
could he have been centering?
could we have been centering?
could you have been centering?
could they have been centering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I center?
couldn't you center?
couldn't he center?
couldn't we center?
couldn't you center?
couldn't they center? 	couldn't I be centering?
couldn't you be centering?
couldn't he be centering?
couldn't we be centering?
couldn't you be centering?
couldn't they be centering? 	couldn't I have centered?
couldn't you have centered?
couldn't he have centered?
couldn't we have centered?
couldn't you have centered?
couldn't they have centered? 	couldn't I have been centering?
couldn't you have been centering?
couldn't he have been centering?
couldn't we have been centering?
couldn't you have been centering?
couldn't they have been centering?