English verb conjugation
MUST REFASTEN

Regular verb: refasten - refastened - refastened

Affirmation

Simple form	V-ing form
I must refasten you must refasten he must refasten we must refasten you must refasten they must refasten	I must be refastening you must be refastening he must be refastening we must be refastening you must be refastening they must be refastening
Perfect	V-ing perfect
I must have refastened you must have refastened he must have refastened we must have refastened you must have refastened they must have refastened	I must have been refastening you must have been refastening he must have been refastening we must have been refastening you must have been refastening they must have been refastening

Negation

Simple form	V-ing form
I mustn't refasten you mustn't refasten he mustn't refasten we mustn't refasten you mustn't refasten they mustn't refasten	I mustn't be refastening you mustn't be refastening he mustn't be refastening we mustn't be refastening you mustn't be refastening they mustn't be refastening
Perfect	V-ing perfect
I mustn't have refastened you mustn't have refastened he mustn't have refastened we mustn't have refastened you mustn't have refastened they mustn't have refastened	I mustn't have been refastening you mustn't have been refastening he mustn't have been refastening we mustn't have been refastening you mustn't have been refastening they mustn't have been refastening

Interrogative form

Simple form	V-ing form
must I refasten? must you refasten? must he refasten? must we refasten? must you refasten? must they refasten?	must I be refastening? must you be refastening? must he be refastening? must we be refastening? must you be refastening? must they be refastening?
Perfect	V-ing perfect
must I have refastened? must you have refastened? must he have refastened? must we have refastened? must you have refastened? must they have refastened?	must I have been refastening? must you have been refastening? must he have been refastening? must we have been refastening? must you have been refastening? must they have been refastening?

Interro-negative form

Simple form	V-ing form
mustn't I refasten? mustn't you refasten? mustn't he refasten? mustn't we refasten? mustn't you refasten? mustn't they refasten?	mustn't I be refastening? mustn't you be refastening? mustn't he be refastening? mustn't we be refastening? mustn't you be refastening? mustn't they be refastening?
Perfect	V-ing perfect
mustn't I have refastened? mustn't you have refastened? mustn't he have refastened? mustn't we have refastened? mustn't you have refastened? mustn't they have refastened?	mustn't I have been refastening? mustn't you have been refastening? mustn't he have been refastening? mustn't we have been refastening? mustn't you have been refastening? mustn't they have been refastening?