English verb conjugation COULD BILLBOARD

Regular verb: billboard - billboarded - billboarded

Affirmation

Simple form

I could billboard
you could billboard
she could billboard
we could billboard
you could billboard
they could billboard

V-ing form

I could be billboarding
you could be billboarding
she could be billboarding
we could be billboarding
you could be billboarding
they could be billboarding

Perfect

I could have billboarded
you could have billboarded
she could have billboarded
we could have billboarded
you could have billboarded
they could have billboarded

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I billboard?
could you billboard?
could she billboard?
could we billboard?
could you billboard?
could they billboard?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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