must forego
Irregular verb: forego - forewent- foregone

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must forego
you must forego
he must forego
we must forego
you must forego
they must forego 	I must be foregoing
you must be foregoing
he must be foregoing
we must be foregoing
you must be foregoing
they must be foregoing	I must have foregone
you must have foregone
he must have foregone
we must have foregone
you must have foregone
they must have foregone	I must have been foregoing
you must have been foregoing
he must have been foregoing
we must have been foregoing
you must have been foregoing
they must have been foregoing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't forego
you mustn't forego
he mustn't forego
we mustn't forego
you mustn't forego
they mustn't forego 	I mustn't be foregoing
you mustn't be foregoing
he mustn't be foregoing
we mustn't be foregoing
you mustn't be foregoing
they mustn't be foregoing	I mustn't have foregone
you mustn't have foregone
he mustn't have foregone
we mustn't have foregone
you mustn't have foregone
they mustn't have foregone	I mustn't have been foregoing
you mustn't have been foregoing
he mustn't have been foregoing
we mustn't have been foregoing
you mustn't have been foregoing
they mustn't have been foregoing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I forego?
must you forego?
must he forego?
must we forego?
must you forego?
must they forego? 	must I be foregoing?
must you be foregoing?
must he be foregoing?
must we be foregoing?
must you be foregoing?
must they be foregoing? 	must I have foregone?
must you have foregone?
must he have foregone?
must we have foregone?
must you have foregone?
must they have foregone? 	must I have been foregoing?
must you have been foregoing?
must he have been foregoing?
must we have been foregoing?
must you have been foregoing?
must they have been foregoing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I forego?
mustn't you forego?
mustn't he forego?
mustn't we forego?
mustn't you forego?
mustn't they forego? 	mustn't I be foregoing?
mustn't you be foregoing?
mustn't he be foregoing?
mustn't we be foregoing?
mustn't you be foregoing?
mustn't they be foregoing? 	mustn't I have foregone?
mustn't you have foregone?
mustn't he have foregone?
mustn't we have foregone?
mustn't you have foregone?
mustn't they have foregone? 	mustn't I have been foregoing?
mustn't you have been foregoing?
mustn't he have been foregoing?
mustn't we have been foregoing?
mustn't you have been foregoing?
mustn't they have been foregoing?