English verb conjugation MUST KEEP

Irregular verb: keep - kept - kept


Affirmation

Simple form

I must keep
you must keep
he must keep
we must keep
you must keep
they must keep

V-ing form

I must be keeping
you must be keeping
he must be keeping
we must be keeping
you must be keeping
they must be keeping

Perfect

I must have kept
you must have kept
he 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
he must have been keeping
we must have been keeping
you must have been keeping
they must have been keeping

Negation

Simple form

I must not keep
you must not keep
he must not keep
we must not keep
you must not keep
they must not keep

V-ing form

I must not be keeping
you must not be keeping
he must not be keeping
we must not be keeping
you must not be keeping
they must not be keeping

Perfect

I must not have kept
you must not have kept
he must not have kept
we must not have kept
you must not have kept
they must not have kept

V-ing perfect

I must not have been keeping
you must not have been keeping
he must not have been keeping
we must not have been keeping
you must not have been keeping
they must not have been keeping

Interrogative form

Simple form

must I keep?
must you keep?
must he keep?
must we keep?
must you keep?
must they keep?

V-ing form

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

Perfect

must I have kept?
must you have kept?
must he 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 he have been keeping?
must we have been keeping?
must you have been keeping?
must they have been keeping?

Interro-negative form

Simple form

must I not keep?
must you not keep?
must he not keep?
must we not keep?
must you not keep?
must they not keep?

V-ing form

must I not be keeping?
must you not be keeping?
must he not be keeping?
must we not be keeping?
must you not be keeping?
must they not be keeping?

Perfect

must I not have kept?
must you not have kept?
must he not have kept?
must we not have kept?
must you not have kept?
must they not have kept?

V-ing perfect

must I not have been keeping?
must you not have been keeping?
must he not have been keeping?
must we not have been keeping?
must you not have been keeping?
must they not have been keeping?