I may refract you may refract he may refract we may refract you may refract they may refract
V-ing form
I may be refracting you may be refracting he may be refracting we may be refracting you may be refracting they may be refracting
Perfect
I may have refracted you may have refracted he may have refracted we may have refracted you may have refracted they may have refracted
V-ing perfect
I may have been refracting you may have been refracting he may have been refracting we may have been refracting you may have been refracting they may have been refracting
Negation
Simple form
I may not refract you may not refract he may not refract we may not refract you may not refract they may not refract
V-ing form
I may not be refracting you may not be refracting he may not be refracting we may not be refracting you may not be refracting they may not be refracting
Perfect
I may not have refracted you may not have refracted he may not have refracted we may not have refracted you may not have refracted they may not have refracted
V-ing perfect
I may not have been refracting you may not have been refracting he may not have been refracting we may not have been refracting you may not have been refracting they may not have been refracting
Interrogative form
Simple form
may I refract? may you refract? may he refract? may we refract? may you refract? may they refract?
V-ing form
may I be refracting? may you be refracting? may he be refracting? may we be refracting? may you be refracting? may they be refracting?
Perfect
may I have refracted? may you have refracted? may he have refracted? may we have refracted? may you have refracted? may they have refracted?
V-ing perfect
may I have been refracting? may you have been refracting? may he have been refracting? may we have been refracting? may you have been refracting? may they have been refracting?
Interro-negative form
Simple form
may I not refract? may you not refract? may he not refract? may we not refract? may you not refract? may they not refract?
V-ing form
may I not be refracting? may you not be refracting? may he not be refracting? may we not be refracting? may you not be refracting? may they not be refracting?
Perfect
may I not have refracted? may you not have refracted? may he not have refracted? may we not have refracted? may you not have refracted? may they not have refracted?
V-ing perfect
may I not have been refracting? may you not have been refracting? may he not have been refracting? may we not have been refracting? may you not have been refracting? may they not have been refracting?