English verb conjugation
COULD STEEPEN

Regular verb: steepen - steepened - steepened

Affirmation

Simple form	V-ing form
I could steepen you could steepen he could steepen we could steepen you could steepen they could steepen	I could be steepening you could be steepening he could be steepening we could be steepening you could be steepening they could be steepening
Perfect	V-ing perfect
I could have steepened you could have steepened he could have steepened we could have steepened you could have steepened they could have steepened	I could have been steepening you could have been steepening he could have been steepening we could have been steepening you could have been steepening they could have been steepening

Negation

Simple form	V-ing form
I could not steepen you could not steepen he could not steepen we could not steepen you could not steepen they could not steepen	I could not be steepening you could not be steepening he could not be steepening we could not be steepening you could not be steepening they could not be steepening
Perfect	V-ing perfect
I could not have steepened you could not have steepened he could not have steepened we could not have steepened you could not have steepened they could not have steepened	I could not have been steepening you could not have been steepening he could not have been steepening we could not have been steepening you could not have been steepening they could not have been steepening

Interrogative form

Simple form	V-ing form
could I steepen? could you steepen? could he steepen? could we steepen? could you steepen? could they steepen?	could I be steepening? could you be steepening? could he be steepening? could we be steepening? could you be steepening? could they be steepening?
Perfect	V-ing perfect
could I have steepened? could you have steepened? could he have steepened? could we have steepened? could you have steepened? could they have steepened?	could I have been steepening? could you have been steepening? could he have been steepening? could we have been steepening? could you have been steepening? could they have been steepening?

Interro-negative form

Simple form	V-ing form
could I not steepen? could you not steepen? could he not steepen? could we not steepen? could you not steepen? could they not steepen?	could I not be steepening? could you not be steepening? could he not be steepening? could we not be steepening? could you not be steepening? could they not be steepening?
Perfect	V-ing perfect
could I not have steepened? could you not have steepened? could he not have steepened? could we not have steepened? could you not have steepened? could they not have steepened?	could I not have been steepening? could you not have been steepening? could he not have been steepening? could we not have been steepening? could you not have been steepening? could they not have been steepening?