must stook
Verbo regular: stook - stooked- stooked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must stook
you must stook
he must stook
we must stook
you must stook
they must stook 	I must be stooking
you must be stooking
he must be stooking
we must be stooking
you must be stooking
they must be stooking	I must have stooked
you must have stooked
he must have stooked
we must have stooked
you must have stooked
they must have stooked	I must have been stooking
you must have been stooking
he must have been stooking
we must have been stooking
you must have been stooking
they must have been stooking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not stook
you must not stook
he must not stook
we must not stook
you must not stook
they must not stook 	I must not be stooking
you must not be stooking
he must not be stooking
we must not be stooking
you must not be stooking
they must not be stooking	I must not have stooked
you must not have stooked
he must not have stooked
we must not have stooked
you must not have stooked
they must not have stooked	I must not have been stooking
you must not have been stooking
he must not have been stooking
we must not have been stooking
you must not have been stooking
they must not have been stooking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I stook?
must you stook?
must he stook?
must we stook?
must you stook?
must they stook? 	must I be stooking?
must you be stooking?
must he be stooking?
must we be stooking?
must you be stooking?
must they be stooking? 	must I have stooked?
must you have stooked?
must he have stooked?
must we have stooked?
must you have stooked?
must they have stooked? 	must I have been stooking?
must you have been stooking?
must he have been stooking?
must we have been stooking?
must you have been stooking?
must they have been stooking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not stook?
must you not stook?
must he not stook?
must we not stook?
must you not stook?
must they not stook? 	must I not be stooking?
must you not be stooking?
must he not be stooking?
must we not be stooking?
must you not be stooking?
must they not be stooking? 	must I not have stooked?
must you not have stooked?
must he not have stooked?
must we not have stooked?
must you not have stooked?
must they not have stooked? 	must I not have been stooking?
must you not have been stooking?
must he not have been stooking?
must we not have been stooking?
must you not have been stooking?
must they not have been stooking?