English verb conjugation
MUST STEEPEN

Regular verb: steepen - steepened - steepened

Affirmation

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

Negation

Simple form	V-ing form
I mustn't steepen you mustn't steepen he mustn't steepen we mustn't steepen you mustn't steepen they mustn't steepen	I mustn't be steepening you mustn't be steepening he mustn't be steepening we mustn't be steepening you mustn't be steepening they mustn't be steepening
Perfect	V-ing perfect
I mustn't have steepened you mustn't have steepened he mustn't have steepened we mustn't have steepened you mustn't have steepened they mustn't have steepened	I mustn't have been steepening you mustn't have been steepening he mustn't have been steepening we mustn't have been steepening you mustn't have been steepening they mustn't have been steepening

Interrogative form

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

Interro-negative form

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