must rationalise
Regular verb: rationalise - rationalised- rationalised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must rationalise
you must rationalise
she must rationalise
we must rationalise
you must rationalise
they must rationalise 	I must be rationalising
you must be rationalising
she must be rationalising
we must be rationalising
you must be rationalising
they must be rationalising	I must have rationalised
you must have rationalised
she must have rationalised
we must have rationalised
you must have rationalised
they must have rationalised	I must have been rationalising
you must have been rationalising
she must have been rationalising
we must have been rationalising
you must have been rationalising
they must have been rationalising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not rationalise
you must not rationalise
she must not rationalise
we must not rationalise
you must not rationalise
they must not rationalise 	I must not be rationalising
you must not be rationalising
she must not be rationalising
we must not be rationalising
you must not be rationalising
they must not be rationalising	I must not have rationalised
you must not have rationalised
she must not have rationalised
we must not have rationalised
you must not have rationalised
they must not have rationalised	I must not have been rationalising
you must not have been rationalising
she must not have been rationalising
we must not have been rationalising
you must not have been rationalising
they must not have been rationalising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I rationalise?
must you rationalise?
must she rationalise?
must we rationalise?
must you rationalise?
must they rationalise? 	must I be rationalising?
must you be rationalising?
must she be rationalising?
must we be rationalising?
must you be rationalising?
must they be rationalising? 	must I have rationalised?
must you have rationalised?
must she have rationalised?
must we have rationalised?
must you have rationalised?
must they have rationalised? 	must I have been rationalising?
must you have been rationalising?
must she have been rationalising?
must we have been rationalising?
must you have been rationalising?
must they have been rationalising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not rationalise?
must you not rationalise?
must she not rationalise?
must we not rationalise?
must you not rationalise?
must they not rationalise? 	must I not be rationalising?
must you not be rationalising?
must she not be rationalising?
must we not be rationalising?
must you not be rationalising?
must they not be rationalising? 	must I not have rationalised?
must you not have rationalised?
must she not have rationalised?
must we not have rationalised?
must you not have rationalised?
must they not have rationalised? 	must I not have been rationalising?
must you not have been rationalising?
must she not have been rationalising?
must we not have been rationalising?
must you not have been rationalising?
must they not have been rationalising?