English verb conjugation COULD OVERHARDEN

Regular verb: overharden - overhardened - overhardened

Affirmation

Simple form

I could overharden
you could overharden
he could overharden
we could overharden
you could overharden
they could overharden

V-ing form

I could be overhardening
you could be overhardening
he could be overhardening
we could be overhardening
you could be overhardening
they could be overhardening

Perfect

I could have overhardened
you could have overhardened
he could have overhardened
we could have overhardened
you could have overhardened
they could have overhardened

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I overharden?
could you overharden?
could he overharden?
could we overharden?
could you overharden?
could they overharden?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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