must stouten
Regular verb: stouten - stoutened- stoutened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must stouten
you must stouten
he must stouten
we must stouten
you must stouten
they must stouten 	I must be stoutening
you must be stoutening
he must be stoutening
we must be stoutening
you must be stoutening
they must be stoutening	I must have stoutened
you must have stoutened
he must have stoutened
we must have stoutened
you must have stoutened
they must have stoutened	I must have been stoutening
you must have been stoutening
he must have been stoutening
we must have been stoutening
you must have been stoutening
they must have been stoutening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't stouten
you mustn't stouten
he mustn't stouten
we mustn't stouten
you mustn't stouten
they mustn't stouten 	I mustn't be stoutening
you mustn't be stoutening
he mustn't be stoutening
we mustn't be stoutening
you mustn't be stoutening
they mustn't be stoutening	I mustn't have stoutened
you mustn't have stoutened
he mustn't have stoutened
we mustn't have stoutened
you mustn't have stoutened
they mustn't have stoutened	I mustn't have been stoutening
you mustn't have been stoutening
he mustn't have been stoutening
we mustn't have been stoutening
you mustn't have been stoutening
they mustn't have been stoutening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I stouten?
must you stouten?
must he stouten?
must we stouten?
must you stouten?
must they stouten? 	must I be stoutening?
must you be stoutening?
must he be stoutening?
must we be stoutening?
must you be stoutening?
must they be stoutening? 	must I have stoutened?
must you have stoutened?
must he have stoutened?
must we have stoutened?
must you have stoutened?
must they have stoutened? 	must I have been stoutening?
must you have been stoutening?
must he have been stoutening?
must we have been stoutening?
must you have been stoutening?
must they have been stoutening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I stouten?
mustn't you stouten?
mustn't he stouten?
mustn't we stouten?
mustn't you stouten?
mustn't they stouten? 	mustn't I be stoutening?
mustn't you be stoutening?
mustn't he be stoutening?
mustn't we be stoutening?
mustn't you be stoutening?
mustn't they be stoutening? 	mustn't I have stoutened?
mustn't you have stoutened?
mustn't he have stoutened?
mustn't we have stoutened?
mustn't you have stoutened?
mustn't they have stoutened? 	mustn't I have been stoutening?
mustn't you have been stoutening?
mustn't he have been stoutening?
mustn't we have been stoutening?
mustn't you have been stoutening?
mustn't they have been stoutening?