can ref
Verbe régulier : ref - refed- refed

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

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I can't ref
you can't ref
she can't ref
we can't ref
you can't ref
they can't ref 	I can't be refing
you can't be refing
she can't be refing
we can't be refing
you can't be refing
they can't be refing	I can't have refed
you can't have refed
she can't have refed
we can't have refed
you can't have refed
they can't have refed	I can't have been refing
you can't have been refing
she can't have been refing
we can't have been refing
you can't have been refing
they can't have been refing	

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

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