must forge
Regular verb: forge - forged- forged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must forge
you must forge
he must forge
we must forge
you must forge
they must forge 	I must be forging
you must be forging
he must be forging
we must be forging
you must be forging
they must be forging	I must have forged
you must have forged
he must have forged
we must have forged
you must have forged
they must have forged	I must have been forging
you must have been forging
he must have been forging
we must have been forging
you must have been forging
they must have been forging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't forge
you mustn't forge
he mustn't forge
we mustn't forge
you mustn't forge
they mustn't forge 	I mustn't be forging
you mustn't be forging
he mustn't be forging
we mustn't be forging
you mustn't be forging
they mustn't be forging	I mustn't have forged
you mustn't have forged
he mustn't have forged
we mustn't have forged
you mustn't have forged
they mustn't have forged	I mustn't have been forging
you mustn't have been forging
he mustn't have been forging
we mustn't have been forging
you mustn't have been forging
they mustn't have been forging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I forge?
must you forge?
must he forge?
must we forge?
must you forge?
must they forge? 	must I be forging?
must you be forging?
must he be forging?
must we be forging?
must you be forging?
must they be forging? 	must I have forged?
must you have forged?
must he have forged?
must we have forged?
must you have forged?
must they have forged? 	must I have been forging?
must you have been forging?
must he have been forging?
must we have been forging?
must you have been forging?
must they have been forging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I forge?
mustn't you forge?
mustn't he forge?
mustn't we forge?
mustn't you forge?
mustn't they forge? 	mustn't I be forging?
mustn't you be forging?
mustn't he be forging?
mustn't we be forging?
mustn't you be forging?
mustn't they be forging? 	mustn't I have forged?
mustn't you have forged?
mustn't he have forged?
mustn't we have forged?
mustn't you have forged?
mustn't they have forged? 	mustn't I have been forging?
mustn't you have been forging?
mustn't he have been forging?
mustn't we have been forging?
mustn't you have been forging?
mustn't they have been forging?