to stack
Regular verb: stack - stacked- stacked

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I stack
you stack
he stacks
we stack
you stack
they stack 	I'mstacking
you'restacking
he'sstacking
we'restacking
you'restacking
they'restacking	I stacked
you stacked
he stacked
we stacked
you stacked
they stacked	Iwasstacking
youwerestacking
hewasstacking
wewerestacking
youwerestacking
theywerestacking	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I've stacked
you've stacked
he's stacked
we've stacked
you've stacked
they've stacked	I'vebeen stacking
you'vebeen stacking
he'sbeen stacking
we'vebeen stacking
you'vebeen stacking
they'vebeen stacking	I'd stacked
you'd stacked
he'd stacked
we'd stacked
you'd stacked
they'd stacked	I'd been stacking
you'd been stacking
he'd been stacking
we'd been stacking
you'd been stacking
they'd been stacking	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I'll stack
you'll stack
he'll stack
we'll stack
you'll stack
they'll stack 	I'll be stacking
you'll be stacking
he'll be stacking
we'll be stacking
you'll be stacking
they'll be stacking	I'll have stacked
you'll have stacked
he'll have stacked
we'll have stacked
you'll have stacked
they'll have stacked	I'll have been stacking
you'll have been stacking
he'll have been stacking
we'll have been stacking
you'll have been stacking
they'll have been stacking	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
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'd have stacked
you'd have stacked
he'd have stacked
we'd have stacked
you'd have stacked
they'd have stacked	I'd have been stacking
you'd have been stacking
he'd have been stacking
we'd have been stacking
you'd have been stacking
they'd have been stacking	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to stack 	 	stack
Let's stack
stack 	 	

Participle 	
Present 	Past 	 	 	
stacking	stacked