must portion
Regular verb: portion - portioned- portioned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must portion
you must portion
he must portion
we must portion
you must portion
they must portion 	I must be portioning
you must be portioning
he must be portioning
we must be portioning
you must be portioning
they must be portioning	I must have portioned
you must have portioned
he must have portioned
we must have portioned
you must have portioned
they must have portioned	I must have been portioning
you must have been portioning
he must have been portioning
we must have been portioning
you must have been portioning
they must have been portioning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not portion
you must not portion
he must not portion
we must not portion
you must not portion
they must not portion 	I must not be portioning
you must not be portioning
he must not be portioning
we must not be portioning
you must not be portioning
they must not be portioning	I must not have portioned
you must not have portioned
he must not have portioned
we must not have portioned
you must not have portioned
they must not have portioned	I must not have been portioning
you must not have been portioning
he must not have been portioning
we must not have been portioning
you must not have been portioning
they must not have been portioning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I portion?
must you portion?
must he portion?
must we portion?
must you portion?
must they portion? 	must I be portioning?
must you be portioning?
must he be portioning?
must we be portioning?
must you be portioning?
must they be portioning? 	must I have portioned?
must you have portioned?
must he have portioned?
must we have portioned?
must you have portioned?
must they have portioned? 	must I have been portioning?
must you have been portioning?
must he have been portioning?
must we have been portioning?
must you have been portioning?
must they have been portioning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not portion?
must you not portion?
must he not portion?
must we not portion?
must you not portion?
must they not portion? 	must I not be portioning?
must you not be portioning?
must he not be portioning?
must we not be portioning?
must you not be portioning?
must they not be portioning? 	must I not have portioned?
must you not have portioned?
must he not have portioned?
must we not have portioned?
must you not have portioned?
must they not have portioned? 	must I not have been portioning?
must you not have been portioning?
must he not have been portioning?
must we not have been portioning?
must you not have been portioning?
must they not have been portioning?