must proposition
Verbo regular: proposition - propositioned- propositioned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must proposition
you must proposition
she must proposition
we must proposition
you must proposition
they must proposition 	I must be propositioning
you must be propositioning
she must be propositioning
we must be propositioning
you must be propositioning
they must be propositioning	I must have propositioned
you must have propositioned
she 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
she must have been propositioning
we must have been propositioning
you must have been propositioning
they must have been propositioning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not proposition
you must not proposition
she must not proposition
we must not proposition
you must not proposition
they must not proposition 	I must not be propositioning
you must not be propositioning
she must not be propositioning
we must not be propositioning
you must not be propositioning
they must not be propositioning	I must not have propositioned
you must not have propositioned
she must not have propositioned
we must not have propositioned
you must not have propositioned
they must not have propositioned	I must not have been propositioning
you must not have been propositioning
she must not have been propositioning
we must not have been propositioning
you must not have been propositioning
they must not have been propositioning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I proposition?
must you proposition?
must she proposition?
must we proposition?
must you proposition?
must they proposition? 	must I be propositioning?
must you be propositioning?
must she be propositioning?
must we be propositioning?
must you be propositioning?
must they be propositioning? 	must I have propositioned?
must you have propositioned?
must she 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 she have been propositioning?
must we have been propositioning?
must you have been propositioning?
must they have been propositioning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not proposition?
must you not proposition?
must she not proposition?
must we not proposition?
must you not proposition?
must they not proposition? 	must I not be propositioning?
must you not be propositioning?
must she not be propositioning?
must we not be propositioning?
must you not be propositioning?
must they not be propositioning? 	must I not have propositioned?
must you not have propositioned?
must she not have propositioned?
must we not have propositioned?
must you not have propositioned?
must they not have propositioned? 	must I not have been propositioning?
must you not have been propositioning?
must she not have been propositioning?
must we not have been propositioning?
must you not have been propositioning?
must they not have been propositioning?