must refine
Regular verb: refine - refined- refined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must refine
you must refine
he must refine
we must refine
you must refine
they must refine 	I must be refining
you must be refining
he must be refining
we must be refining
you must be refining
they must be refining	I must have refined
you must have refined
he must have refined
we must have refined
you must have refined
they must have refined	I must have been refining
you must have been refining
he must have been refining
we must have been refining
you must have been refining
they must have been refining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't refine
you mustn't refine
he mustn't refine
we mustn't refine
you mustn't refine
they mustn't refine 	I mustn't be refining
you mustn't be refining
he mustn't be refining
we mustn't be refining
you mustn't be refining
they mustn't be refining	I mustn't have refined
you mustn't have refined
he mustn't have refined
we mustn't have refined
you mustn't have refined
they mustn't have refined	I mustn't have been refining
you mustn't have been refining
he mustn't have been refining
we mustn't have been refining
you mustn't have been refining
they mustn't have been refining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I refine?
must you refine?
must he refine?
must we refine?
must you refine?
must they refine? 	must I be refining?
must you be refining?
must he be refining?
must we be refining?
must you be refining?
must they be refining? 	must I have refined?
must you have refined?
must he have refined?
must we have refined?
must you have refined?
must they have refined? 	must I have been refining?
must you have been refining?
must he have been refining?
must we have been refining?
must you have been refining?
must they have been refining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I refine?
mustn't you refine?
mustn't he refine?
mustn't we refine?
mustn't you refine?
mustn't they refine? 	mustn't I be refining?
mustn't you be refining?
mustn't he be refining?
mustn't we be refining?
mustn't you be refining?
mustn't they be refining? 	mustn't I have refined?
mustn't you have refined?
mustn't he have refined?
mustn't we have refined?
mustn't you have refined?
mustn't they have refined? 	mustn't I have been refining?
mustn't you have been refining?
mustn't he have been refining?
mustn't we have been refining?
mustn't you have been refining?
mustn't they have been refining?