could refract
Verbe régulier : refract - refracted- refracted
Traduction française : réfracter - se réfracter 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could refract
you could refract
he could refract
we could refract
you could refract
they could refract 	I could be refracting
you could be refracting
he could be refracting
we could be refracting
you could be refracting
they could be refracting	I could have refracted
you could have refracted
he could have refracted
we could have refracted
you could have refracted
they could have refracted	I could have been refracting
you could have been refracting
he could have been refracting
we could have been refracting
you could have been refracting
they could have been refracting	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not refract
you could not refract
he could not refract
we could not refract
you could not refract
they could not refract 	I could not be refracting
you could not be refracting
he could not be refracting
we could not be refracting
you could not be refracting
they could not be refracting	I could not have refracted
you could not have refracted
he could not have refracted
we could not have refracted
you could not have refracted
they could not have refracted	I could not have been refracting
you could not have been refracting
he could not have been refracting
we could not have been refracting
you could not have been refracting
they could not have been refracting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I refract?
could you refract?
could he refract?
could we refract?
could you refract?
could they refract? 	could I be refracting?
could you be refracting?
could he be refracting?
could we be refracting?
could you be refracting?
could they be refracting? 	could I have refracted?
could you have refracted?
could he have refracted?
could we have refracted?
could you have refracted?
could they have refracted? 	could I have been refracting?
could you have been refracting?
could he have been refracting?
could we have been refracting?
could you have been refracting?
could they have been refracting? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not refract?
could you not refract?
could he not refract?
could we not refract?
could you not refract?
could they not refract? 	could I not be refracting?
could you not be refracting?
could he not be refracting?
could we not be refracting?
could you not be refracting?
could they not be refracting? 	could I not have refracted?
could you not have refracted?
could he not have refracted?
could we not have refracted?
could you not have refracted?
could they not have refracted? 	could I not have been refracting?
could you not have been refracting?
could he not have been refracting?
could we not have been refracting?
could you not have been refracting?
could they not have been refracting?