The Conjugator
English verb conjugation
MUST KEEN

Regular verb: keen - keened - keened

Affirmation

Simple form

V-ing form

I must keen
you must keen
she must keen
we must keen
you must keen
they must keen
I must be keening
you must be keening
she must be keening
we must be keening
you must be keening
they must be keening

Perfect

V-ing perfect

I must have keened
you must have keened
she must have keened
we must have keened
you must have keened
they must have keened
I must have been keening
you must have been keening
she must have been keening
we must have been keening
you must have been keening
they must have been keening

Negation

Simple form

V-ing form

I mustn't keen
you mustn't keen
she mustn't keen
we mustn't keen
you mustn't keen
they mustn't keen
I mustn't be keening
you mustn't be keening
she mustn't be keening
we mustn't be keening
you mustn't be keening
they mustn't be keening

Perfect

V-ing perfect

I mustn't have keened
you mustn't have keened
she mustn't have keened
we mustn't have keened
you mustn't have keened
they mustn't have keened
I mustn't have been keening
you mustn't have been keening
she mustn't have been keening
we mustn't have been keening
you mustn't have been keening
they mustn't have been keening

Interrogative form

Simple form

V-ing form

must I keen?
must you keen?
must she keen?
must we keen?
must you keen?
must they keen?
must I be keening?
must you be keening?
must she be keening?
must we be keening?
must you be keening?
must they be keening?

Perfect

V-ing perfect

must I have keened?
must you have keened?
must she have keened?
must we have keened?
must you have keened?
must they have keened?
must I have been keening?
must you have been keening?
must she have been keening?
must we have been keening?
must you have been keening?
must they have been keening?

Interro-negative form

Simple form

V-ing form

mustn't I keen?
mustn't you keen?
mustn't she keen?
mustn't we keen?
mustn't you keen?
mustn't they keen?
mustn't I be keening?
mustn't you be keening?
mustn't she be keening?
mustn't we be keening?
mustn't you be keening?
mustn't they be keening?

Perfect

V-ing perfect

mustn't I have keened?
mustn't you have keened?
mustn't she have keened?
mustn't we have keened?
mustn't you have keened?
mustn't they have keened?
mustn't I have been keening?
mustn't you have been keening?
mustn't she have been keening?
mustn't we have been keening?
mustn't you have been keening?
mustn't they have been keening?