English verb conjugation
CAN OVERHARDEN

Regular verb: overharden - overhardened - overhardened

Affirmation

Simple form	V-ing form
I can overharden you can overharden he can overharden we can overharden you can overharden they can overharden	I can be overhardening you can be overhardening he can be overhardening we can be overhardening you can be overhardening they can be overhardening
Perfect	V-ing perfect
I can have overhardened you can have overhardened he can have overhardened we can have overhardened you can have overhardened they can have overhardened	I can have been overhardening you can have been overhardening he can have been overhardening we can have been overhardening you can have been overhardening they can have been overhardening

Negation

Simple form	V-ing form
I can't overharden you can't overharden he can't overharden we can't overharden you can't overharden they can't overharden	I can't be overhardening you can't be overhardening he can't be overhardening we can't be overhardening you can't be overhardening they can't be overhardening
Perfect	V-ing perfect
I can't have overhardened you can't have overhardened he can't have overhardened we can't have overhardened you can't have overhardened they can't have overhardened	I can't have been overhardening you can't have been overhardening he can't have been overhardening we can't have been overhardening you can't have been overhardening they can't have been overhardening

Interrogative form

Simple form	V-ing form
can I overharden? can you overharden? can he overharden? can we overharden? can you overharden? can they overharden?	can I be overhardening? can you be overhardening? can he be overhardening? can we be overhardening? can you be overhardening? can they be overhardening?
Perfect	V-ing perfect
can I have overhardened? can you have overhardened? can he have overhardened? can we have overhardened? can you have overhardened? can they have overhardened?	can I have been overhardening? can you have been overhardening? can he have been overhardening? can we have been overhardening? can you have been overhardening? can they have been overhardening?

Interro-negative form

Simple form	V-ing form
can't I overharden? can't you overharden? can't he overharden? can't we overharden? can't you overharden? can't they overharden?	can't I be overhardening? can't you be overhardening? can't he be overhardening? can't we be overhardening? can't you be overhardening? can't they be overhardening?
Perfect	V-ing perfect
can't I have overhardened? can't you have overhardened? can't he have overhardened? can't we have overhardened? can't you have overhardened? can't they have overhardened?	can't I have been overhardening? can't you have been overhardening? can't he have been overhardening? can't we have been overhardening? can't you have been overhardening? can't they have been overhardening?