must refasten
Regular verb: refasten - refastened- refastened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?