would stack
Regular verb: stack - stacked- stacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd stack
you'd stack
he'd stack
we'd stack
you'd stack
they'd stack 	I'd be stacking
you'd be stacking
he'd be stacking
we'd be stacking
you'd be stacking
they'd be stacking	I would've stacked
you would've stacked
he would've stacked
we would've stacked
you would've stacked
they would've stacked	I would've been stacking
you would've been stacking
he would've been stacking
we would've been stacking
you would've been stacking
they would've been stacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I wouldn't stack
you wouldn't stack
he wouldn't stack
we wouldn't stack
you wouldn't stack
they wouldn't stack 	I wouldn't be stacking
you wouldn't be stacking
he wouldn't be stacking
we wouldn't be stacking
you wouldn't be stacking
they wouldn't be stacking	I wouldn't have stacked
you wouldn't have stacked
he wouldn't have stacked
we wouldn't have stacked
you wouldn't have stacked
they wouldn't have stacked	I wouldn't have been stacking
you wouldn't have been stacking
he wouldn't have been stacking
we wouldn't have been stacking
you wouldn't have been stacking
they wouldn't have been stacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
would I stack?
would you stack?
would he stack?
would we stack?
would you stack?
would they stack? 	would I be stacking?
would you be stacking?
would he be stacking?
would we be stacking?
would you be stacking?
would they be stacking? 	would I have stacked?
would you have stacked?
would he have stacked?
would we have stacked?
would you have stacked?
would they have stacked? 	would I have been stacking?
would you have been stacking?
would he have been stacking?
would we have been stacking?
would you have been stacking?
would they have been stacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
wouldn't I stack?
wouldn't you stack?
wouldn't he stack?
wouldn't we stack?
wouldn't you stack?
wouldn't they stack? 	wouldn't I be stacking?
wouldn't you be stacking?
wouldn't he be stacking?
wouldn't we be stacking?
wouldn't you be stacking?
wouldn't they be stacking? 	wouldn't I have stacked?
wouldn't you have stacked?
wouldn't he have stacked?
wouldn't we have stacked?
wouldn't you have stacked?
wouldn't they have stacked? 	wouldn't I have been stacking?
wouldn't you have been stacking?
wouldn't he have been stacking?
wouldn't we have been stacking?
wouldn't you have been stacking?
wouldn't they have been stacking?