can refract
Regular verb: refract - refracted- refracted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can refract
you can refract
he can refract
we can refract
you can refract
they can refract 	I can be refracting
you can be refracting
he can be refracting
we can be refracting
you can be refracting
they can be refracting	I can have refracted
you can have refracted
he can have refracted
we can have refracted
you can have refracted
they can have refracted	I can have been refracting
you can have been refracting
he can have been refracting
we can have been refracting
you can have been refracting
they can have been refracting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't refract
you can't refract
he can't refract
we can't refract
you can't refract
they can't refract 	I can't be refracting
you can't be refracting
he can't be refracting
we can't be refracting
you can't be refracting
they can't be refracting	I can't have refracted
you can't have refracted
he can't have refracted
we can't have refracted
you can't have refracted
they can't have refracted	I can't have been refracting
you can't have been refracting
he can't have been refracting
we can't have been refracting
you can't have been refracting
they can't have been refracting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I refract?
can you refract?
can he refract?
can we refract?
can you refract?
can they refract? 	can I be refracting?
can you be refracting?
can he be refracting?
can we be refracting?
can you be refracting?
can they be refracting? 	can I have refracted?
can you have refracted?
can he have refracted?
can we have refracted?
can you have refracted?
can they have refracted? 	can I have been refracting?
can you have been refracting?
can he have been refracting?
can we have been refracting?
can you have been refracting?
can they have been refracting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I refract?
can't you refract?
can't he refract?
can't we refract?
can't you refract?
can't they refract? 	can't I be refracting?
can't you be refracting?
can't he be refracting?
can't we be refracting?
can't you be refracting?
can't they be refracting? 	can't I have refracted?
can't you have refracted?
can't he have refracted?
can't we have refracted?
can't you have refracted?
can't they have refracted? 	can't I have been refracting?
can't you have been refracting?
can't he have been refracting?
can't we have been refracting?
can't you have been refracting?
can't they have been refracting?