English verb conjugation MUST UNTIE

Regular verb: untie - untied - untied

Affirmation

Simple form

I must untie
you must untie
he must untie
we must untie
you must untie
they must untie

V-ing form

I must be untying
you must be untying
he must be untying
we must be untying
you must be untying
they must be untying

Perfect

I must have untied
you must have untied
he must have untied
we must have untied
you must have untied
they must have untied

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I untie?
must you untie?
must he untie?
must we untie?
must you untie?
must they untie?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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