must stock
Verbo regular: stock - stocked- stocked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must stock
you must stock
he must stock
we must stock
you must stock
they must stock 	I must be stocking
you must be stocking
he must be stocking
we must be stocking
you must be stocking
they must be stocking	I must have stocked
you must have stocked
he must have stocked
we must have stocked
you must have stocked
they must have stocked	I must have been stocking
you must have been stocking
he must have been stocking
we must have been stocking
you must have been stocking
they must have been stocking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not stock
you must not stock
he must not stock
we must not stock
you must not stock
they must not stock 	I must not be stocking
you must not be stocking
he must not be stocking
we must not be stocking
you must not be stocking
they must not be stocking	I must not have stocked
you must not have stocked
he must not have stocked
we must not have stocked
you must not have stocked
they must not have stocked	I must not have been stocking
you must not have been stocking
he must not have been stocking
we must not have been stocking
you must not have been stocking
they must not have been stocking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I stock?
must you stock?
must he stock?
must we stock?
must you stock?
must they stock? 	must I be stocking?
must you be stocking?
must he be stocking?
must we be stocking?
must you be stocking?
must they be stocking? 	must I have stocked?
must you have stocked?
must he have stocked?
must we have stocked?
must you have stocked?
must they have stocked? 	must I have been stocking?
must you have been stocking?
must he have been stocking?
must we have been stocking?
must you have been stocking?
must they have been stocking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not stock?
must you not stock?
must he not stock?
must we not stock?
must you not stock?
must they not stock? 	must I not be stocking?
must you not be stocking?
must he not be stocking?
must we not be stocking?
must you not be stocking?
must they not be stocking? 	must I not have stocked?
must you not have stocked?
must he not have stocked?
must we not have stocked?
must you not have stocked?
must they not have stocked? 	must I not have been stocking?
must you not have been stocking?
must he not have been stocking?
must we not have been stocking?
must you not have been stocking?
must they not have been stocking?