could prolong
Verbe régulier : prolong - prolonged- prolonged
Traduction française : prolonger 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could prolong
you could prolong
she could prolong
we could prolong
you could prolong
they could prolong 	I could be prolonging
you could be prolonging
she could be prolonging
we could be prolonging
you could be prolonging
they could be prolonging	I could have prolonged
you could have prolonged
she could have prolonged
we could have prolonged
you could have prolonged
they could have prolonged	I could have been prolonging
you could have been prolonging
she could have been prolonging
we could have been prolonging
you could have been prolonging
they could have been prolonging	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't prolong
you couldn't prolong
she couldn't prolong
we couldn't prolong
you couldn't prolong
they couldn't prolong 	I couldn't be prolonging
you couldn't be prolonging
she couldn't be prolonging
we couldn't be prolonging
you couldn't be prolonging
they couldn't be prolonging	I couldn't have prolonged
you couldn't have prolonged
she couldn't have prolonged
we couldn't have prolonged
you couldn't have prolonged
they couldn't have prolonged	I couldn't have been prolonging
you couldn't have been prolonging
she couldn't have been prolonging
we couldn't have been prolonging
you couldn't have been prolonging
they couldn't have been prolonging	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I prolong?
could you prolong?
could she prolong?
could we prolong?
could you prolong?
could they prolong? 	could I be prolonging?
could you be prolonging?
could she be prolonging?
could we be prolonging?
could you be prolonging?
could they be prolonging? 	could I have prolonged?
could you have prolonged?
could she have prolonged?
could we have prolonged?
could you have prolonged?
could they have prolonged? 	could I have been prolonging?
could you have been prolonging?
could she have been prolonging?
could we have been prolonging?
could you have been prolonging?
could they have been prolonging? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I prolong?
couldn't you prolong?
couldn't she prolong?
couldn't we prolong?
couldn't you prolong?
couldn't they prolong? 	couldn't I be prolonging?
couldn't you be prolonging?
couldn't she be prolonging?
couldn't we be prolonging?
couldn't you be prolonging?
couldn't they be prolonging? 	couldn't I have prolonged?
couldn't you have prolonged?
couldn't she have prolonged?
couldn't we have prolonged?
couldn't you have prolonged?
couldn't they have prolonged? 	couldn't I have been prolonging?
couldn't you have been prolonging?
couldn't she have been prolonging?
couldn't we have been prolonging?
couldn't you have been prolonging?
couldn't they have been prolonging?