could stock
Regular verb: stock - stocked- stocked

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not stock
you could not stock
he could not stock
we could not stock
you could not stock
they could not stock 	I could not be stocking
you could not be stocking
he could not be stocking
we could not be stocking
you could not be stocking
they could not be stocking	I could not have stocked
you could not have stocked
he could not have stocked
we could not have stocked
you could not have stocked
they could not have stocked	I could not have been stocking
you could not have been stocking
he could not have been stocking
we could not have been stocking
you could not have been stocking
they could not have been stocking	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not stock?
could you not stock?
could he not stock?
could we not stock?
could you not stock?
could they not stock? 	could I not be stocking?
could you not be stocking?
could he not be stocking?
could we not be stocking?
could you not be stocking?
could they not be stocking? 	could I not have stocked?
could you not have stocked?
could he not have stocked?
could we not have stocked?
could you not have stocked?
could they not have stocked? 	could I not have been stocking?
could you not have been stocking?
could he not have been stocking?
could we not have been stocking?
could you not have been stocking?
could they not have been stocking?