must subject
Regular verb: subject - subjected- subjected

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must subject
you must subject
he must subject
we must subject
you must subject
they must subject 	I must be subjecting
you must be subjecting
he must be subjecting
we must be subjecting
you must be subjecting
they must be subjecting	I must have subjected
you must have subjected
he must have subjected
we must have subjected
you must have subjected
they must have subjected	I must have been subjecting
you must have been subjecting
he must have been subjecting
we must have been subjecting
you must have been subjecting
they must have been subjecting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not subject
you must not subject
he must not subject
we must not subject
you must not subject
they must not subject 	I must not be subjecting
you must not be subjecting
he must not be subjecting
we must not be subjecting
you must not be subjecting
they must not be subjecting	I must not have subjected
you must not have subjected
he must not have subjected
we must not have subjected
you must not have subjected
they must not have subjected	I must not have been subjecting
you must not have been subjecting
he must not have been subjecting
we must not have been subjecting
you must not have been subjecting
they must not have been subjecting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I subject?
must you subject?
must he subject?
must we subject?
must you subject?
must they subject? 	must I be subjecting?
must you be subjecting?
must he be subjecting?
must we be subjecting?
must you be subjecting?
must they be subjecting? 	must I have subjected?
must you have subjected?
must he have subjected?
must we have subjected?
must you have subjected?
must they have subjected? 	must I have been subjecting?
must you have been subjecting?
must he have been subjecting?
must we have been subjecting?
must you have been subjecting?
must they have been subjecting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not subject?
must you not subject?
must he not subject?
must we not subject?
must you not subject?
must they not subject? 	must I not be subjecting?
must you not be subjecting?
must he not be subjecting?
must we not be subjecting?
must you not be subjecting?
must they not be subjecting? 	must I not have subjected?
must you not have subjected?
must he not have subjected?
must we not have subjected?
must you not have subjected?
must they not have subjected? 	must I not have been subjecting?
must you not have been subjecting?
must he not have been subjecting?
must we not have been subjecting?
must you not have been subjecting?
must they not have been subjecting?