English verb conjugation COULD STAIN

Regular verb: stain - stained - stained

Affirmation

Simple form

I could stain
you could stain
she could stain
we could stain
you could stain
they could stain

V-ing form

I could be staining
you could be staining
she could be staining
we could be staining
you could be staining
they could be staining

Perfect

I could have stained
you could have stained
she 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
she could have been staining
we could have been staining
you could have been staining
they could have been staining

Negation

Simple form

I couldn't stain
you couldn't stain
she couldn't stain
we couldn't stain
you couldn't stain
they couldn't stain

V-ing form

I couldn't be staining
you couldn't be staining
she couldn't be staining
we couldn't be staining
you couldn't be staining
they couldn't be staining

Perfect

I couldn't have stained
you couldn't have stained
she couldn't have stained
we couldn't have stained
you couldn't have stained
they couldn't have stained

V-ing perfect

I couldn't have been staining
you couldn't have been staining
she couldn't have been staining
we couldn't have been staining
you couldn't have been staining
they couldn't have been staining

Interrogative form

Simple form

could I stain?
could you stain?
could she stain?
could we stain?
could you stain?
could they stain?

V-ing form

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

Perfect

could I have stained?
could you have stained?
could she 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 she have been staining?
could we have been staining?
could you have been staining?
could they have been staining?

Interro-negative form

Simple form

couldn't I stain?
couldn't you stain?
couldn't she stain?
couldn't we stain?
couldn't you stain?
couldn't they stain?

V-ing form

couldn't I be staining?
couldn't you be staining?
couldn't she be staining?
couldn't we be staining?
couldn't you be staining?
couldn't they be staining?

Perfect

couldn't I have stained?
couldn't you have stained?
couldn't she have stained?
couldn't we have stained?
couldn't you have stained?
couldn't they have stained?

V-ing perfect

couldn't I have been staining?
couldn't you have been staining?
couldn't she have been staining?
couldn't we have been staining?
couldn't you have been staining?
couldn't they have been staining?

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