English verb conjugation CAN STACK

Regular verb: stack - stacked - stacked

Affirmation

Simple form

I can stack
you can stack
he can stack
we can stack
you can stack
they can stack

V-ing form

I can be stacking
you can be stacking
he can be stacking
we can be stacking
you can be stacking
they can be stacking

Perfect

I can have stacked
you can have stacked
he can have stacked
we can have stacked
you can have stacked
they can have stacked

V-ing perfect

I can have been stacking
you can have been stacking
he can have been stacking
we can have been stacking
you can have been stacking
they can have been stacking

Negation

Simple form

I can't stack
you can't stack
he can't stack
we can't stack
you can't stack
they can't stack

V-ing form

I can't be stacking
you can't be stacking
he can't be stacking
we can't be stacking
you can't be stacking
they can't be stacking

Perfect

I can't have stacked
you can't have stacked
he can't have stacked
we can't have stacked
you can't have stacked
they can't have stacked

V-ing perfect

I can't have been stacking
you can't have been stacking
he can't have been stacking
we can't have been stacking
you can't have been stacking
they can't have been stacking

Interrogative form

Simple form

can I stack?
can you stack?
can he stack?
can we stack?
can you stack?
can they stack?

V-ing form

can I be stacking?
can you be stacking?
can he be stacking?
can we be stacking?
can you be stacking?
can they be stacking?

Perfect

can I have stacked?
can you have stacked?
can he have stacked?
can we have stacked?
can you have stacked?
can they have stacked?

V-ing perfect

can I have been stacking?
can you have been stacking?
can he have been stacking?
can we have been stacking?
can you have been stacking?
can they have been stacking?

Interro-negative form

Simple form

can't I stack?
can't you stack?
can't he stack?
can't we stack?
can't you stack?
can't they stack?

V-ing form

can't I be stacking?
can't you be stacking?
can't he be stacking?
can't we be stacking?
can't you be stacking?
can't they be stacking?

Perfect

can't I have stacked?
can't you have stacked?
can't he have stacked?
can't we have stacked?
can't you have stacked?
can't they have stacked?

V-ing perfect

can't I have been stacking?
can't you have been stacking?
can't he have been stacking?
can't we have been stacking?
can't you have been stacking?
can't they have been stacking?

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