English verb conjugation MUST GUM

Regular verb: gum - gummed - gummed

Affirmation

Simple form

I must gum
you must gum
he must gum
we must gum
you must gum
they must gum

V-ing form

I must be gumming
you must be gumming
he must be gumming
we must be gumming
you must be gumming
they must be gumming

Perfect

I must have gummed
you must have gummed
he must have gummed
we must have gummed
you must have gummed
they must have gummed

V-ing perfect

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

Negation

Simple form

I mustn't gum
you mustn't gum
he mustn't gum
we mustn't gum
you mustn't gum
they mustn't gum

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I gum?
must you gum?
must he gum?
must we gum?
must you gum?
must they gum?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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