must refract
Verbo regolare: refract - refracted- refracted

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must refract
you must refract
she must refract
we must refract
you must refract
they must refract 	I must be refracting
you must be refracting
she must be refracting
we must be refracting
you must be refracting
they must be refracting	I must have refracted
you must have refracted
she must have refracted
we must have refracted
you must have refracted
they must have refracted	I must have been refracting
you must have been refracting
she must have been refracting
we must have been refracting
you must have been refracting
they must have been refracting	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not refract
you must not refract
she must not refract
we must not refract
you must not refract
they must not refract 	I must not be refracting
you must not be refracting
she must not be refracting
we must not be refracting
you must not be refracting
they must not be refracting	I must not have refracted
you must not have refracted
she must not have refracted
we must not have refracted
you must not have refracted
they must not have refracted	I must not have been refracting
you must not have been refracting
she must not have been refracting
we must not have been refracting
you must not have been refracting
they must not have been refracting	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I refract?
must you refract?
must she refract?
must we refract?
must you refract?
must they refract? 	must I be refracting?
must you be refracting?
must she be refracting?
must we be refracting?
must you be refracting?
must they be refracting? 	must I have refracted?
must you have refracted?
must she have refracted?
must we have refracted?
must you have refracted?
must they have refracted? 	must I have been refracting?
must you have been refracting?
must she have been refracting?
must we have been refracting?
must you have been refracting?
must they have been refracting? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not refract?
must you not refract?
must she not refract?
must we not refract?
must you not refract?
must they not refract? 	must I not be refracting?
must you not be refracting?
must she not be refracting?
must we not be refracting?
must you not be refracting?
must they not be refracting? 	must I not have refracted?
must you not have refracted?
must she not have refracted?
must we not have refracted?
must you not have refracted?
must they not have refracted? 	must I not have been refracting?
must you not have been refracting?
must she not have been refracting?
must we not have been refracting?
must you not have been refracting?
must they not have been refracting?