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 mustn't mast
you mustn't mast
he mustn't mast
we mustn't mast
you mustn't mast
they mustn't mast

V-ing form

I mustn't be masting
you mustn't be masting
he mustn't be masting
we mustn't be masting
you mustn't be masting
they mustn't be masting

Perfect

I mustn't have masted
you mustn't have masted
he mustn't have masted
we mustn't have masted
you mustn't have masted
they mustn't have masted

V-ing perfect

I mustn't have been masting
you mustn't have been masting
he mustn't have been masting
we mustn't have been masting
you mustn't have been masting
they mustn't 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

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

V-ing form

mustn't I be masting?
mustn't you be masting?
mustn't he be masting?
mustn't we be masting?
mustn't you be masting?
mustn't they be masting?

Perfect

mustn't I have masted?
mustn't you have masted?
mustn't he have masted?
mustn't we have masted?
mustn't you have masted?
mustn't they have masted?

V-ing perfect

mustn't I have been masting?
mustn't you have been masting?
mustn't he have been masting?
mustn't we have been masting?
mustn't you have been masting?
mustn't they have been masting?

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