must rationalize
Regular verb: rationalize - rationalized- rationalized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must rationalize
you must rationalize
he must rationalize
we must rationalize
you must rationalize
they must rationalize 	I must be rationalizing
you must be rationalizing
he must be rationalizing
we must be rationalizing
you must be rationalizing
they must be rationalizing	I must have rationalized
you must have rationalized
he must have rationalized
we must have rationalized
you must have rationalized
they must have rationalized	I must have been rationalizing
you must have been rationalizing
he must have been rationalizing
we must have been rationalizing
you must have been rationalizing
they must have been rationalizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not rationalize
you must not rationalize
he must not rationalize
we must not rationalize
you must not rationalize
they must not rationalize 	I must not be rationalizing
you must not be rationalizing
he must not be rationalizing
we must not be rationalizing
you must not be rationalizing
they must not be rationalizing	I must not have rationalized
you must not have rationalized
he must not have rationalized
we must not have rationalized
you must not have rationalized
they must not have rationalized	I must not have been rationalizing
you must not have been rationalizing
he must not have been rationalizing
we must not have been rationalizing
you must not have been rationalizing
they must not have been rationalizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I rationalize?
must you rationalize?
must he rationalize?
must we rationalize?
must you rationalize?
must they rationalize? 	must I be rationalizing?
must you be rationalizing?
must he be rationalizing?
must we be rationalizing?
must you be rationalizing?
must they be rationalizing? 	must I have rationalized?
must you have rationalized?
must he have rationalized?
must we have rationalized?
must you have rationalized?
must they have rationalized? 	must I have been rationalizing?
must you have been rationalizing?
must he have been rationalizing?
must we have been rationalizing?
must you have been rationalizing?
must they have been rationalizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not rationalize?
must you not rationalize?
must he not rationalize?
must we not rationalize?
must you not rationalize?
must they not rationalize? 	must I not be rationalizing?
must you not be rationalizing?
must he not be rationalizing?
must we not be rationalizing?
must you not be rationalizing?
must they not be rationalizing? 	must I not have rationalized?
must you not have rationalized?
must he not have rationalized?
must we not have rationalized?
must you not have rationalized?
must they not have rationalized? 	must I not have been rationalizing?
must you not have been rationalizing?
must he not have been rationalizing?
must we not have been rationalizing?
must you not have been rationalizing?
must they not have been rationalizing?