could ref
Verbe régulier : ref - refed- refed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could ref
you could ref
she could ref
we could ref
you could ref
they could ref 	I could be refing
you could be refing
she could be refing
we could be refing
you could be refing
they could be refing	I could have refed
you could have refed
she could have refed
we could have refed
you could have refed
they could have refed	I could have been refing
you could have been refing
she could have been refing
we could have been refing
you could have been refing
they could have been refing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not ref
you could not ref
she could not ref
we could not ref
you could not ref
they could not ref 	I could not be refing
you could not be refing
she could not be refing
we could not be refing
you could not be refing
they could not be refing	I could not have refed
you could not have refed
she could not have refed
we could not have refed
you could not have refed
they could not have refed	I could not have been refing
you could not have been refing
she could not have been refing
we could not have been refing
you could not have been refing
they could not have been refing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I ref?
could you ref?
could she ref?
could we ref?
could you ref?
could they ref? 	could I be refing?
could you be refing?
could she be refing?
could we be refing?
could you be refing?
could they be refing? 	could I have refed?
could you have refed?
could she have refed?
could we have refed?
could you have refed?
could they have refed? 	could I have been refing?
could you have been refing?
could she have been refing?
could we have been refing?
could you have been refing?
could they have been refing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not ref?
could you not ref?
could she not ref?
could we not ref?
could you not ref?
could they not ref? 	could I not be refing?
could you not be refing?
could she not be refing?
could we not be refing?
could you not be refing?
could they not be refing? 	could I not have refed?
could you not have refed?
could she not have refed?
could we not have refed?
could you not have refed?
could they not have refed? 	could I not have been refing?
could you not have been refing?
could she not have been refing?
could we not have been refing?
could you not have been refing?
could they not have been refing?