English verb conjugation COULD BILLBOARD

Regular verb: billboard - billboarded - billboarded

Affirmation

Simple form

I could billboard
you could billboard
he could billboard
we could billboard
you could billboard
they could billboard

V-ing form

I could be billboarding
you could be billboarding
he could be billboarding
we could be billboarding
you could be billboarding
they could be billboarding

Perfect

I could have billboarded
you could have billboarded
he 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
he 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
he 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
he 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
he 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
he 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 he billboard?
could we billboard?
could you billboard?
could they billboard?

V-ing form

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

Perfect

could I have billboarded?
could you have billboarded?
could he 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 he 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 he 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 he 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 he 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 he 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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