must stock
Regular verb: stock - stocked- stocked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must stock
you must stock
she must stock
we must stock
you must stock
they must stock 	I must be stocking
you must be stocking
she must be stocking
we must be stocking
you must be stocking
they must be stocking	I must have stocked
you must have stocked
she 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
she must have been stocking
we must have been stocking
you must have been stocking
they must have been stocking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not stock
you must not stock
she 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
she 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
she 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
she must not have been stocking
we must not have been stocking
you must not have been stocking
they must not have been stocking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I stock?
must you stock?
must she stock?
must we stock?
must you stock?
must they stock? 	must I be stocking?
must you be stocking?
must she be stocking?
must we be stocking?
must you be stocking?
must they be stocking? 	must I have stocked?
must you have stocked?
must she 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 she have been stocking?
must we have been stocking?
must you have been stocking?
must they have been stocking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not stock?
must you not stock?
must she 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 she 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 she 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 she not have been stocking?
must we not have been stocking?
must you not have been stocking?
must they not have been stocking?