English verb conjugation COULD DEMARK

Regular verb: demark - demarked - demarked

Affirmation

Simple form

I could demark
you could demark
she could demark
we could demark
you could demark
they could demark

V-ing form

I could be demarking
you could be demarking
she could be demarking
we could be demarking
you could be demarking
they could be demarking

Perfect

I could have demarked
you could have demarked
she could have demarked
we could have demarked
you could have demarked
they could have demarked

V-ing perfect

I could have been demarking
you could have been demarking
she could have been demarking
we could have been demarking
you could have been demarking
they could have been demarking

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I demark?
could you demark?
could she demark?
could we demark?
could you demark?
could they demark?

V-ing form

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

Perfect

could I have demarked?
could you have demarked?
could she have demarked?
could we have demarked?
could you have demarked?
could they have demarked?

V-ing perfect

could I have been demarking?
could you have been demarking?
could she have been demarking?
could we have been demarking?
could you have been demarking?
could they have been demarking?

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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