must proposition
Regular verb: proposition - propositioned- propositioned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must proposition
you must proposition
he must proposition
we must proposition
you must proposition
they must proposition 	I must be propositioning
you must be propositioning
he must be propositioning
we must be propositioning
you must be propositioning
they must be propositioning	I must have propositioned
you must have propositioned
he must have propositioned
we must have propositioned
you must have propositioned
they must have propositioned	I must have been propositioning
you must have been propositioning
he must have been propositioning
we must have been propositioning
you must have been propositioning
they must have been propositioning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't proposition
you mustn't proposition
he mustn't proposition
we mustn't proposition
you mustn't proposition
they mustn't proposition 	I mustn't be propositioning
you mustn't be propositioning
he mustn't be propositioning
we mustn't be propositioning
you mustn't be propositioning
they mustn't be propositioning	I mustn't have propositioned
you mustn't have propositioned
he mustn't have propositioned
we mustn't have propositioned
you mustn't have propositioned
they mustn't have propositioned	I mustn't have been propositioning
you mustn't have been propositioning
he mustn't have been propositioning
we mustn't have been propositioning
you mustn't have been propositioning
they mustn't have been propositioning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I proposition?
must you proposition?
must he proposition?
must we proposition?
must you proposition?
must they proposition? 	must I be propositioning?
must you be propositioning?
must he be propositioning?
must we be propositioning?
must you be propositioning?
must they be propositioning? 	must I have propositioned?
must you have propositioned?
must he have propositioned?
must we have propositioned?
must you have propositioned?
must they have propositioned? 	must I have been propositioning?
must you have been propositioning?
must he have been propositioning?
must we have been propositioning?
must you have been propositioning?
must they have been propositioning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I proposition?
mustn't you proposition?
mustn't he proposition?
mustn't we proposition?
mustn't you proposition?
mustn't they proposition? 	mustn't I be propositioning?
mustn't you be propositioning?
mustn't he be propositioning?
mustn't we be propositioning?
mustn't you be propositioning?
mustn't they be propositioning? 	mustn't I have propositioned?
mustn't you have propositioned?
mustn't he have propositioned?
mustn't we have propositioned?
mustn't you have propositioned?
mustn't they have propositioned? 	mustn't I have been propositioning?
mustn't you have been propositioning?
mustn't he have been propositioning?
mustn't we have been propositioning?
mustn't you have been propositioning?
mustn't they have been propositioning?