must apportion
Regular verb: apportion - apportioned- apportioned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must apportion
you must apportion
he must apportion
we must apportion
you must apportion
they must apportion 	I must be apportioning
you must be apportioning
he must be apportioning
we must be apportioning
you must be apportioning
they must be apportioning	I must have apportioned
you must have apportioned
he must have apportioned
we must have apportioned
you must have apportioned
they must have apportioned	I must have been apportioning
you must have been apportioning
he must have been apportioning
we must have been apportioning
you must have been apportioning
they must have been apportioning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not apportion
you must not apportion
he must not apportion
we must not apportion
you must not apportion
they must not apportion 	I must not be apportioning
you must not be apportioning
he must not be apportioning
we must not be apportioning
you must not be apportioning
they must not be apportioning	I must not have apportioned
you must not have apportioned
he must not have apportioned
we must not have apportioned
you must not have apportioned
they must not have apportioned	I must not have been apportioning
you must not have been apportioning
he must not have been apportioning
we must not have been apportioning
you must not have been apportioning
they must not have been apportioning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I apportion?
must you apportion?
must he apportion?
must we apportion?
must you apportion?
must they apportion? 	must I be apportioning?
must you be apportioning?
must he be apportioning?
must we be apportioning?
must you be apportioning?
must they be apportioning? 	must I have apportioned?
must you have apportioned?
must he have apportioned?
must we have apportioned?
must you have apportioned?
must they have apportioned? 	must I have been apportioning?
must you have been apportioning?
must he have been apportioning?
must we have been apportioning?
must you have been apportioning?
must they have been apportioning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not apportion?
must you not apportion?
must he not apportion?
must we not apportion?
must you not apportion?
must they not apportion? 	must I not be apportioning?
must you not be apportioning?
must he not be apportioning?
must we not be apportioning?
must you not be apportioning?
must they not be apportioning? 	must I not have apportioned?
must you not have apportioned?
must he not have apportioned?
must we not have apportioned?
must you not have apportioned?
must they not have apportioned? 	must I not have been apportioning?
must you not have been apportioning?
must he not have been apportioning?
must we not have been apportioning?
must you not have been apportioning?
must they not have been apportioning?