English verb conjugation MUST STEEPEN

Regular verb: steepen - steepened - steepened

Affirmation

Simple form

I must steepen
you must steepen
he must steepen
we must steepen
you must steepen
they must steepen

V-ing form

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

I must have steepened
you must have steepened
he must have steepened
we must have steepened
you must have steepened
they must have steepened

V-ing perfect

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

I mustn't steepen
you mustn't steepen
he mustn't steepen
we mustn't steepen
you mustn't steepen
they mustn't steepen

V-ing form

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

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

V-ing perfect

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

must I steepen?
must you steepen?
must he steepen?
must we steepen?
must you steepen?
must they steepen?

V-ing form

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

must I have steepened?
must you have steepened?
must he have steepened?
must we have steepened?
must you have steepened?
must they have steepened?

V-ing perfect

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

mustn't I steepen?
mustn't you steepen?
mustn't he steepen?
mustn't we steepen?
mustn't you steepen?
mustn't they steepen?

V-ing form

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

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?

V-ing perfect

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?

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