English verb conjugation
MUST REFRACT

Regular verb: refract - refracted - refracted

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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