English verb conjugation MUST UMBER

Regular verb: umber - umbered - umbered

Affirmation

Simple form

I must umber
you must umber
he must umber
we must umber
you must umber
they must umber

V-ing form

I must be umbering
you must be umbering
he must be umbering
we must be umbering
you must be umbering
they must be umbering

Perfect

I must have umbered
you must have umbered
he must have umbered
we must have umbered
you must have umbered
they must have umbered

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I umber?
must you umber?
must he umber?
must we umber?
must you umber?
must they umber?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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