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 cannot overharden you cannot overharden he cannot overharden we cannot overharden you cannot overharden they cannot overharden	I cannot be overhardening you cannot be overhardening he cannot be overhardening we cannot be overhardening you cannot be overhardening they cannot be overhardening
Perfect	V-ing perfect
I cannot have overhardened you cannot have overhardened he cannot have overhardened we cannot have overhardened you cannot have overhardened they cannot have overhardened	I cannot have been overhardening you cannot have been overhardening he cannot have been overhardening we cannot have been overhardening you cannot have been overhardening they cannot 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 I not overharden? can you not overharden? can he not overharden? can we not overharden? can you not overharden? can they not overharden?	can I not be overhardening? can you not be overhardening? can he not be overhardening? can we not be overhardening? can you not be overhardening? can they not be overhardening?
Perfect	V-ing perfect
can I not have overhardened? can you not have overhardened? can he not have overhardened? can we not have overhardened? can you not have overhardened? can they not have overhardened?	can I not have been overhardening? can you not have been overhardening? can he not have been overhardening? can we not have been overhardening? can you not have been overhardening? can they not have been overhardening?