English verb conjugation
COULD REHARDEN

Regular verb: reharden - rehardened - rehardened

Affirmation

Simple form	V-ing form
I could reharden you could reharden she could reharden we could reharden you could reharden they could reharden	I could be rehardening you could be rehardening she could be rehardening we could be rehardening you could be rehardening they could be rehardening
Perfect	V-ing perfect
I could have rehardened you could have rehardened she could have rehardened we could have rehardened you could have rehardened they could have rehardened	I could have been rehardening you could have been rehardening she could have been rehardening we could have been rehardening you could have been rehardening they could have been rehardening

Negation

Simple form	V-ing form
I couldn't reharden you couldn't reharden she couldn't reharden we couldn't reharden you couldn't reharden they couldn't reharden	I couldn't be rehardening you couldn't be rehardening she couldn't be rehardening we couldn't be rehardening you couldn't be rehardening they couldn't be rehardening
Perfect	V-ing perfect
I couldn't have rehardened you couldn't have rehardened she couldn't have rehardened we couldn't have rehardened you couldn't have rehardened they couldn't have rehardened	I couldn't have been rehardening you couldn't have been rehardening she couldn't have been rehardening we couldn't have been rehardening you couldn't have been rehardening they couldn't have been rehardening

Interrogative form

Simple form	V-ing form
could I reharden? could you reharden? could she reharden? could we reharden? could you reharden? could they reharden?	could I be rehardening? could you be rehardening? could she be rehardening? could we be rehardening? could you be rehardening? could they be rehardening?
Perfect	V-ing perfect
could I have rehardened? could you have rehardened? could she have rehardened? could we have rehardened? could you have rehardened? could they have rehardened?	could I have been rehardening? could you have been rehardening? could she have been rehardening? could we have been rehardening? could you have been rehardening? could they have been rehardening?

Interro-negative form

Simple form	V-ing form
couldn't I reharden? couldn't you reharden? couldn't she reharden? couldn't we reharden? couldn't you reharden? couldn't they reharden?	couldn't I be rehardening? couldn't you be rehardening? couldn't she be rehardening? couldn't we be rehardening? couldn't you be rehardening? couldn't they be rehardening?
Perfect	V-ing perfect
couldn't I have rehardened? couldn't you have rehardened? couldn't she have rehardened? couldn't we have rehardened? couldn't you have rehardened? couldn't they have rehardened?	couldn't I have been rehardening? couldn't you have been rehardening? couldn't she have been rehardening? couldn't we have been rehardening? couldn't you have been rehardening? couldn't they have been rehardening?