could concert
Verbe régulier : concert - concerted- concerted
Traduction française : concerter - arranger 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could concert
you could concert
he could concert
we could concert
you could concert
they could concert 	I could be concerting
you could be concerting
he could be concerting
we could be concerting
you could be concerting
they could be concerting	I could have concerted
you could have concerted
he could have concerted
we could have concerted
you could have concerted
they could have concerted	I could have been concerting
you could have been concerting
he could have been concerting
we could have been concerting
you could have been concerting
they could have been concerting	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't concert
you couldn't concert
he couldn't concert
we couldn't concert
you couldn't concert
they couldn't concert 	I couldn't be concerting
you couldn't be concerting
he couldn't be concerting
we couldn't be concerting
you couldn't be concerting
they couldn't be concerting	I couldn't have concerted
you couldn't have concerted
he couldn't have concerted
we couldn't have concerted
you couldn't have concerted
they couldn't have concerted	I couldn't have been concerting
you couldn't have been concerting
he couldn't have been concerting
we couldn't have been concerting
you couldn't have been concerting
they couldn't have been concerting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I concert?
could you concert?
could he concert?
could we concert?
could you concert?
could they concert? 	could I be concerting?
could you be concerting?
could he be concerting?
could we be concerting?
could you be concerting?
could they be concerting? 	could I have concerted?
could you have concerted?
could he have concerted?
could we have concerted?
could you have concerted?
could they have concerted? 	could I have been concerting?
could you have been concerting?
could he have been concerting?
could we have been concerting?
could you have been concerting?
could they have been concerting? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I concert?
couldn't you concert?
couldn't he concert?
couldn't we concert?
couldn't you concert?
couldn't they concert? 	couldn't I be concerting?
couldn't you be concerting?
couldn't he be concerting?
couldn't we be concerting?
couldn't you be concerting?
couldn't they be concerting? 	couldn't I have concerted?
couldn't you have concerted?
couldn't he have concerted?
couldn't we have concerted?
couldn't you have concerted?
couldn't they have concerted? 	couldn't I have been concerting?
couldn't you have been concerting?
couldn't he have been concerting?
couldn't we have been concerting?
couldn't you have been concerting?
couldn't they have been concerting?