English verb conjugation MUST KEEP

Irregular verb: keep - kept - kept

Affirmation

Simple form

I must keep
you must keep
she must keep
we must keep
you must keep
they must keep

V-ing form

I must be keeping
you must be keeping
she must be keeping
we must be keeping
you must be keeping
they must be keeping

Perfect

I must have kept
you must have kept
she must have kept
we must have kept
you must have kept
they must have kept

V-ing perfect

I must have been keeping
you must have been keeping
she must have been keeping
we must have been keeping
you must have been keeping
they must have been keeping

Negation

Simple form

I mustn't keep
you mustn't keep
she mustn't keep
we mustn't keep
you mustn't keep
they mustn't keep

V-ing form

I mustn't be keeping
you mustn't be keeping
she mustn't be keeping
we mustn't be keeping
you mustn't be keeping
they mustn't be keeping

Perfect

I mustn't have kept
you mustn't have kept
she mustn't have kept
we mustn't have kept
you mustn't have kept
they mustn't have kept

V-ing perfect

I mustn't have been keeping
you mustn't have been keeping
she mustn't have been keeping
we mustn't have been keeping
you mustn't have been keeping
they mustn't have been keeping

Interrogative form

Simple form

must I keep?
must you keep?
must she keep?
must we keep?
must you keep?
must they keep?

V-ing form

must I be keeping?
must you be keeping?
must she be keeping?
must we be keeping?
must you be keeping?
must they be keeping?

Perfect

must I have kept?
must you have kept?
must she have kept?
must we have kept?
must you have kept?
must they have kept?

V-ing perfect

must I have been keeping?
must you have been keeping?
must she have been keeping?
must we have been keeping?
must you have been keeping?
must they have been keeping?

Interro-negative form

Simple form

mustn't I keep?
mustn't you keep?
mustn't she keep?
mustn't we keep?
mustn't you keep?
mustn't they keep?

V-ing form

mustn't I be keeping?
mustn't you be keeping?
mustn't she be keeping?
mustn't we be keeping?
mustn't you be keeping?
mustn't they be keeping?

Perfect

mustn't I have kept?
mustn't you have kept?
mustn't she have kept?
mustn't we have kept?
mustn't you have kept?
mustn't they have kept?

V-ing perfect

mustn't I have been keeping?
mustn't you have been keeping?
mustn't she have been keeping?
mustn't we have been keeping?
mustn't you have been keeping?
mustn't they have been keeping?

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