English verb conjugation COULD STAIN

Regular verb: stain - stained - stained

Affirmation

Simple form

I could stain
you could stain
he could stain
we could stain
you could stain
they could stain

V-ing form

I could be staining
you could be staining
he could be staining
we could be staining
you could be staining
they could be staining

Perfect

I could have stained
you could have stained
he could have stained
we could have stained
you could have stained
they could have stained

V-ing perfect

I could have been staining
you could have been staining
he could have been staining
we could have been staining
you could have been staining
they could have been staining

Negation

Simple form

I could not stain
you could not stain
he could not stain
we could not stain
you could not stain
they could not stain

V-ing form

I could not be staining
you could not be staining
he could not be staining
we could not be staining
you could not be staining
they could not be staining

Perfect

I could not have stained
you could not have stained
he could not have stained
we could not have stained
you could not have stained
they could not have stained

V-ing perfect

I could not have been staining
you could not have been staining
he could not have been staining
we could not have been staining
you could not have been staining
they could not have been staining

Interrogative form

Simple form

could I stain?
could you stain?
could he stain?
could we stain?
could you stain?
could they stain?

V-ing form

could I be staining?
could you be staining?
could he be staining?
could we be staining?
could you be staining?
could they be staining?

Perfect

could I have stained?
could you have stained?
could he have stained?
could we have stained?
could you have stained?
could they have stained?

V-ing perfect

could I have been staining?
could you have been staining?
could he have been staining?
could we have been staining?
could you have been staining?
could they have been staining?

Interro-negative form

Simple form

could I not stain?
could you not stain?
could he not stain?
could we not stain?
could you not stain?
could they not stain?

V-ing form

could I not be staining?
could you not be staining?
could he not be staining?
could we not be staining?
could you not be staining?
could they not be staining?

Perfect

could I not have stained?
could you not have stained?
could he not have stained?
could we not have stained?
could you not have stained?
could they not have stained?

V-ing perfect

could I not have been staining?
could you not have been staining?
could he not have been staining?
could we not have been staining?
could you not have been staining?
could they not have been staining?

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