could perdure
Verbe régulier : perdure - perdured- perdured

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could perdure
you could perdure
she could perdure
we could perdure
you could perdure
they could perdure 	I could be perduring
you could be perduring
she could be perduring
we could be perduring
you could be perduring
they could be perduring	I could have perdured
you could have perdured
she could have perdured
we could have perdured
you could have perdured
they could have perdured	I could have been perduring
you could have been perduring
she could have been perduring
we could have been perduring
you could have been perduring
they could have been perduring	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not perdure
you could not perdure
she could not perdure
we could not perdure
you could not perdure
they could not perdure 	I could not be perduring
you could not be perduring
she could not be perduring
we could not be perduring
you could not be perduring
they could not be perduring	I could not have perdured
you could not have perdured
she could not have perdured
we could not have perdured
you could not have perdured
they could not have perdured	I could not have been perduring
you could not have been perduring
she could not have been perduring
we could not have been perduring
you could not have been perduring
they could not have been perduring	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I perdure?
could you perdure?
could she perdure?
could we perdure?
could you perdure?
could they perdure? 	could I be perduring?
could you be perduring?
could she be perduring?
could we be perduring?
could you be perduring?
could they be perduring? 	could I have perdured?
could you have perdured?
could she have perdured?
could we have perdured?
could you have perdured?
could they have perdured? 	could I have been perduring?
could you have been perduring?
could she have been perduring?
could we have been perduring?
could you have been perduring?
could they have been perduring? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not perdure?
could you not perdure?
could she not perdure?
could we not perdure?
could you not perdure?
could they not perdure? 	could I not be perduring?
could you not be perduring?
could she not be perduring?
could we not be perduring?
could you not be perduring?
could they not be perduring? 	could I not have perdured?
could you not have perdured?
could she not have perdured?
could we not have perdured?
could you not have perdured?
could they not have perdured? 	could I not have been perduring?
could you not have been perduring?
could she not have been perduring?
could we not have been perduring?
could you not have been perduring?
could they not have been perduring?