English verb conjugation COULD HARDEN

Regular verb: harden - hardened - hardened

Affirmation

Simple form

I could harden
you could harden
he could harden
we could harden
you could harden
they could harden

V-ing form

I could be hardening
you could be hardening
he could be hardening
we could be hardening
you could be hardening
they could be hardening

Perfect

I could have hardened
you could have hardened
he could have hardened
we could have hardened
you could have hardened
they could have hardened

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I harden?
could you harden?
could he harden?
could we harden?
could you harden?
could they harden?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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