English verb conjugation MUST MAST

Regular verb: mast - masted - masted


Affirmation

Simple form

I must mast
you must mast
he must mast
we must mast
you must mast
they must mast

V-ing form

I must be masting
you must be masting
he must be masting
we must be masting
you must be masting
they must be masting

Perfect

I must have masted
you must have masted
he must have masted
we must have masted
you must have masted
they must have masted

V-ing perfect

I must have been masting
you must have been masting
he must have been masting
we must have been masting
you must have been masting
they must have been masting

Negation

Simple form

I must not mast
you must not mast
he must not mast
we must not mast
you must not mast
they must not mast

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I mast?
must you mast?
must he mast?
must we mast?
must you mast?
must they mast?

V-ing form

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

Perfect

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

V-ing perfect

must I have been masting?
must you have been masting?
must he have been masting?
must we have been masting?
must you have been masting?
must they have been masting?

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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