English verb conjugation COULD SUBMARINE

Regular verb: submarine - submarined - submarined

Affirmation

Simple form

I could submarine
you could submarine
he could submarine
we could submarine
you could submarine
they could submarine

V-ing form

I could be submarining
you could be submarining
he could be submarining
we could be submarining
you could be submarining
they could be submarining

Perfect

I could have submarined
you could have submarined
he could have submarined
we could have submarined
you could have submarined
they could have submarined

V-ing perfect

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

Negation

Simple form

I couldn't submarine
you couldn't submarine
he couldn't submarine
we couldn't submarine
you couldn't submarine
they couldn't submarine

V-ing form

I couldn't be submarining
you couldn't be submarining
he couldn't be submarining
we couldn't be submarining
you couldn't be submarining
they couldn't be submarining

Perfect

I couldn't have submarined
you couldn't have submarined
he couldn't have submarined
we couldn't have submarined
you couldn't have submarined
they couldn't have submarined

V-ing perfect

I couldn't have been submarining
you couldn't have been submarining
he couldn't have been submarining
we couldn't have been submarining
you couldn't have been submarining
they couldn't have been submarining

Interrogative form

Simple form

could I submarine?
could you submarine?
could he submarine?
could we submarine?
could you submarine?
could they submarine?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

couldn't I submarine?
couldn't you submarine?
couldn't he submarine?
couldn't we submarine?
couldn't you submarine?
couldn't they submarine?

V-ing form

couldn't I be submarining?
couldn't you be submarining?
couldn't he be submarining?
couldn't we be submarining?
couldn't you be submarining?
couldn't they be submarining?

Perfect

couldn't I have submarined?
couldn't you have submarined?
couldn't he have submarined?
couldn't we have submarined?
couldn't you have submarined?
couldn't they have submarined?

V-ing perfect

couldn't I have been submarining?
couldn't you have been submarining?
couldn't he have been submarining?
couldn't we have been submarining?
couldn't you have been submarining?
couldn't they have been submarining?

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