I must refract you must refract she must refract we must refract you must refract they must refract
Forma com V-ing
I must be refracting you must be refracting she must be refracting we must be refracting you must be refracting they must be refracting
Perfeito
I must have refracted you must have refracted she must have refracted we must have refracted you must have refracted they must have refracted
Perfeito com V-ing
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
Negação
Forma simple
I must not refract you must not refract she must not refract we must not refract you must not refract they must not refract
Forma com V-ing
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
Perfeito
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
Perfeito com V-ing
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 simple
must I refract? must you refract? must she refract? must we refract? must you refract? must they refract?
Forma com V-ing
must I be refracting? must you be refracting? must she be refracting? must we be refracting? must you be refracting? must they be refracting?
Perfeito
must I have refracted? must you have refracted? must she have refracted? must we have refracted? must you have refracted? must they have refracted?
Perfeito com V-ing
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-Negação
Forma simple
must I not refract? must you not refract? must she not refract? must we not refract? must you not refract? must they not refract?
Forma com V-ing
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?
Perfeito
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?
Perfeito com V-ing
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?