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 couldn't steepen you couldn't steepen he couldn't steepen we couldn't steepen you couldn't steepen they couldn't steepen	I couldn't be steepening you couldn't be steepening he couldn't be steepening we couldn't be steepening you couldn't be steepening they couldn't be steepening
Perfect	V-ing perfect
I couldn't have steepened you couldn't have steepened he couldn't have steepened we couldn't have steepened you couldn't have steepened they couldn't have steepened	I couldn't have been steepening you couldn't have been steepening he couldn't have been steepening we couldn't have been steepening you couldn't have been steepening they couldn't 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
couldn't I steepen? couldn't you steepen? couldn't he steepen? couldn't we steepen? couldn't you steepen? couldn't they steepen?	couldn't I be steepening? couldn't you be steepening? couldn't he be steepening? couldn't we be steepening? couldn't you be steepening? couldn't they be steepening?
Perfect	V-ing perfect
couldn't I have steepened? couldn't you have steepened? couldn't he have steepened? couldn't we have steepened? couldn't you have steepened? couldn't they have steepened?	couldn't I have been steepening? couldn't you have been steepening? couldn't he have been steepening? couldn't we have been steepening? couldn't you have been steepening? couldn't they have been steepening?